Captains of Crush Progression Ladder: The Complete System from Guide to #3 and Beyond
The Captains of Crush gripper is the universal benchmark for crushing grip strength. Closing a #3 under official conditions earns you IronMind certification - a distinction held by just over 200 people since 1991, including World's Strongest Man competitors like Brian Shaw and Magnus Samuelsson. But reaching #3, or even moving from the Guide to the #1, takes more than picking up a gripper and squeezing hard every day. It takes a system: structured progression, the right tools at each stage, and an honest understanding of where the real sticking points are.
This guide gives you that system from start to finish - whether you just bought your first Captains of Crush gripper or have been stuck between the #2 and #3 for months.
Understanding the Captains of Crush Scale
IronMind introduced the Captains of Crush line in 1991, using knurled aircraft-grade aluminum handles and proprietary springs rated to specific resistances. The jumps between levels are not uniform - the 20-pound step from Guide to Sport is manageable in weeks. The 85-pound gap from #2 to #3 is a different kind of challenge, which is why the #3 certification carries real weight.
| CoC Level | Resistance (lb) | Resistance (kg) | Difficulty | Who Is Typically Here |
|---|---|---|---|---|
| Guide | 60 | 27 | Entry | Most adult males; solid starting point for untrained hands |
| Sport | 80 | 36 | Beginner | Anyone with a few weeks of grip work; recreational athletes |
| Trainer | 100 | 45 | Novice | Regular gym-goer with decent overall strength |
| #0.5 | 120 | 54 | Intermediate | Someone who has trained grip specifically for 2-3 months |
| #1 | 140 | 64 | Solid | Serious trainees; strong recreational powerlifters or climbers |
| #1.5 | 167.5 | 76 | Strong | Dedicated grip trainees with 6+ months of focused work |
| #2 | 195 | 88 | Very Strong | Competitive strength athletes; upper 5% of grip trainees |
| #2.5 | 237.5 | 108 | Elite | Top competitive grip athletes and elite strength competitors |
| #3 | 280 | 127 | World-Class | ~208 certified athletes worldwide since 1991 |
| #3.5 | 322.5 | 146 | Extraordinary | A handful of athletes across all of grip sport history |
| #4 | 365 | 166 | Nearly Impossible | Fewer than five people have been officially certified |
The Progression System: How to Move Through Each Level
The two-gripper method is the foundation of effective CoC training. You keep two grippers in play at all times: a working gripper you can close for multiple clean reps, and a goal gripper one level above where you can get clean reps. Most volume goes on the working gripper. The goal gripper gets used for negatives, partial closes, and occasional heavy attempts. This structure keeps you always building toward something specific rather than grinding the same gripper until you stall.
Set position matters from day one. The proper set positions the bottom handle across the lower palm, with the top handle across the mid-finger pads. IronMind's certification rules require a starting gap no narrower than the width of a CoC card. A credit close means you start with the gripper handles at least a “credit card” width apart before you close it. Training sloppy technique just grooves a pattern that will not transfer when it counts.
Linear progression will stall, usually around the #1 to #1.5 transition. Connective tissue adapts more slowly than muscle. When you hit that wall, adding volume variation, intensity cycling, deloads, and supplementary work is what breaks through it - not simply more grinding.
Level-by-Level Programming
Stage 1 - Guide to Trainer: The Foundation
This stage is about grooving the pattern, building tendon resilience, and establishing consistent grip work. Do not rush it - tendons adapt more slowly than muscle, and the volume base you build here supports everything above it.
| Exercise | Sets | Reps / Hold | RPE | Frequency |
|---|---|---|---|---|
| Working gripper closes (Guide or Sport) | 4 | 8-12 | 6-7 | 3×/week |
| Goal gripper attempts (Sport or Trainer) | 3 | 3-5 | 8-9 | 3×/week |
| Extensor band opens | 2 | 15 | 5 | 3×/week |
| Wrist curls (palms up, light dumbbell) | 3 | 15 | 6 | 2×/week |
Rest 2-3 minutes between gripper sets. Use extensor bands at the end of every session - two sets of 15 reps, full extension, slow return. You do not need chalk yet. Keep it simple and consistent.
Equipment: CoC Guide, CoC Sport, CoC Trainer, extensor bands. Timeline: 4-8 weeks to close the Trainer cleanly for 5 reps from a legal set position.
Stage 2 - Trainer to #1: The First Real Challenge
The 40-pound step from Trainer to #1 is where negatives and timed holds stop being optional and become necessary tools. This is also where chalk and precise hand positioning start to matter a lot more.
| Exercise | Sets | Reps / Hold | RPE | Frequency |
|---|---|---|---|---|
| Working gripper closes (Trainer or 0.5) | 5 | 5-8 | 7-8 | 3×/week |
| Goal gripper negatives (#1) | 4 | 3-4 reps (5-sec lowering) | 8 | 2×/week |
| Top-position timed holds (working gripper) | 3 | 5-8 seconds | 7 | 2×/week |
| Credit close attempts (#1) | 2-3 | Singles | 9-10 | 1×/week |
| Extensor band opens | 2 | 15 | 5 | 3×/week |
Introduce chalk here - magnesium carbonate only, applied to the hand, not the handles. IronMind's certification rules specifically prohibit liquid chalk. Film yourself occasionally to check set position; a half-set (gripper deeper in the palm) is common at this stage and quietly undermines long-term progress.
Equipment: CoC Trainer, CoC 0.5, CoC #1, chalk. Timeline: 6-12 weeks to close the #1 cleanly with proper credit close technique from a legal set position.
Stage 3 - #1 to #2: Where Most People Stall
This is the most important section in this guide. The transition from #1 to #2 is where the majority of dedicated grip trainees spend months - or stop progressing entirely. The 55-pound resistance increase is real, but the stall is almost always a programming problem, not a hard strength ceiling.
Why people stall here: insufficient volume variation; no scheduled deloads; skipping supplementary work like pinch training and thick bar holds; doing negatives only with grippers they can already close. The fix is specific, not just “try harder.”
| Exercise | Sets | Reps / Hold | RPE | Session |
|---|---|---|---|---|
| Heavy working closes (#1.5) | 5 | 3-5 | 8-9 | Heavy (Mon) |
| Overcrush holds (#1, closed position) | 4 | 6-10 seconds | 8 | Heavy (Mon) |
| Heavy negatives (#2) | 4 | 3 reps (6-sec lowering) | 9 | Heavy (Mon) |
| Volume closes (#1 or #1.5) | 6 | 8-10 | 6-7 | Volume (Wed) |
| Partial closes from midrange (#2) | 4 | 5 | 8 | Volume (Wed) |
| Pinch training (plates or pinch block) | 3 | 5-8 second holds | 7 | Both sessions |
| Loading pin or thick bar holds | 3 | 15-20 seconds | 7 | Volume (Wed) |
| Wrist roller (both directions) | 3 | Full roll | 6 | Volume (Wed) |
| Credit close attempt (#2) | 2-3 | Singles | 10 | Saturday only |
Run 4-week cycles: three hard weeks followed by one deload week (two light sessions, no max attempts). Deloads are not optional - they are where adaptation locks in. Pinch training with a loading pin and pinch block builds the thumb-base strength needed to power through the final inch of a #2 close. Two or three sets of 5-second holds at a challenging weight, twice per week, will produce visible results within 6-8 weeks.
Equipment: CoC #1, CoC #1.5, CoC #2, loading pin, pinch block, chalk, extensor bands, wrist roller. Timeline: 3-6 months with consistent, structured training and scheduled deloads.
Stage 4 - #2 to #3: The Certification Chase
The honest timeline here is 6 to 18 months of dedicated, well-programmed training. Many strong athletes spend longer. That is not failure - it is the nature of the #3. Programming at this level uses a periodized mesocycle structure designed to peak your strength for specific attempts.
| Mesocycle Week | Focus | Key Work | RPE |
|---|---|---|---|
| Week 1 (Volume) | Accumulation | 6×5 at #2, 4×4 negatives at #2.5, pinch and thick bar | 7-8 |
| Week 2 (Intensity) | Overload | Heavy singles at #2, 4×3 negatives at #2.5, isometric holds at sticking point | 8-9 |
| Week 3 (Peak) | Max Effort | Speed closes at #2, 2-3 singles at #2.5, one #3 attempt | 9-10 |
| Week 4 (Deload) | Recovery | Light closes at #1.5 and #2, no max attempts, extensor and wrist work | 5-6 |
Add speed closes to your peak weeks: close your #2 as explosively as possible - three sets of 5 singles with 90 seconds rest. This develops rate of force development, a quality pure grinding does not address. For sticking point isometrics, have a partner assist you to where you fail on the #3 and hold for 5-8 seconds across four sets. This directly strengthens your weakest position.
The mental component is real. Do not attempt a max-effort #3 at the end of a hard session as an afterthought. Program it as the main event of that day: full rest, deliberate preparation, methodical warmup.
When you are ready for official certification, IronMind now accepts video-based submissions. They send you a sealed CoC #3 gripper and a CoC card. You open the package on camera, demonstrate the legal starting gap with the card, and close under standard rules. Chalk is permitted; liquid chalk is not.
Equipment: CoC #2, CoC #2.5, CoC #3, loading pin, pinch block, chalk, extensor bands, wrist roller, thick bar access. Timeline: 6-18 months of structured training.
Supplementary Training That Accelerates Progress
- Extensor work: Every session, every stage. Extensor bands balance the muscles that open the hand against the flexors trained by gripper work. Two sets of 15 reps per session prevent the tendon imbalances that cause injury in dedicated grip trainees.
- Pinch training: Plate pinches and pinch block holds develop thumb-base and proximal finger strength that transfers directly to #2 and #3 closing force. Three sets of 5-10 second holds at challenging weight, twice per week.
- Thick bar and loading pin work: Holding a loading pin or thick axle bar forces the hand to generate pressure without the mechanical assistance of gripper handles. Thick bar farmer carries are especially effective for building overall hand strength.
- Wrist curls and rollers: Forearm musculature drives finger strength. A wrist roller in both directions addresses flexor and extensor forearm compartments equally. Three full rolls per direction, twice per week.
How Gripper Strength Transfers to Your Sport
Arm wrestling: Crushing grip is one of the three primary strength qualities in arm wrestling, alongside pronation and lateral pressure. A strong #2 close gives you a meaningful mechanical advantage in hand control and cupping positions. Many competitive arm wrestlers train CoC grippers specifically for this transfer.
Climbing: Gripper work strengthens the flexor tendons and palm musculature that support harder holds. The transfer is real but specific - contact strength in open or half crimp positions is different from crushing. Extensor work keeps the tendon system balanced, a persistent problem for high-volume climbers.
Powerlifting and deadlifts: Most powerlifters switch to straps before grip is their actual limiting factor, leaving it undertrained relative to their pulling muscles. Regular CoC work raises the ceiling on barbell grip, and loading pin work adds direct deadlift-style specificity to your grip training.
General strength training: A trained grip creates confidence under heavy loads - you feel more secure under a barbell, on a pull-up bar, or in any compound movement where the hands are in the chain.
Common Mistakes That Kill Gripper Progress
- Training too frequently without deloads. The hands and forearms are resilient but not immune to cumulative fatigue. Hard training five or six days per week with no scheduled recovery week reliably stalls progress. Plan your deloads in advance.
- Never doing negatives with a heavy enough gripper. Negatives with a gripper you can already close provide minimal overload. Use your goal gripper - the one you cannot close yet - for negatives. Eccentric loading is the primary method for building strength beyond your current closing ability.
- Ignoring set position. A wide set in the palm reduces effective range of motion and will not pass a referee's inspection. Practice legal set position from day one so the movement is automatic when it counts.
- Skipping supplementary work. Gripper closes build a narrow base. Pinch training, thick bar work, and extensor work address specific weaknesses that gripper work alone cannot reach - particularly at Stage 3 and beyond.
- Attempting max singles every session. A true max-effort single takes significant neural recovery. Reserve credit close attempts for once per week or less, at the end of a peak phase. Attempting your goal gripper daily trains the nervous system to fail.
- Jumping levels before you are ready. A gripper is not your working gripper until you can close it for 5 clean reps from a legal set position. Move levels when you earn it, not when you think you should.
Frequently Asked Questions
How long does it take to close a CoC #3?
From a starting point of closing the #1, most dedicated athletes take 18 months to 3-plus years. From the #2, the range is typically 6 to 18 months. Structured programming with deloads and supplementary work puts you at the faster end of that range. There is no shortcut.
Should I train grippers every day?
Not at moderate to heavy intensity. Connective tissue in the fingers and palms requires 48-72 hours of recovery after a demanding session. Two to three sessions per week with dedicated rest days is the evidence-supported standard for long-term progress without overuse injury.
What is the difference between a credit card close and a regular close?
A credit card close (or credit card set) is a standardized way of closing a hand gripper where you must start with the handles at least a “credit card” width apart before you squeeze. In practice, you insert an actual card (or official spacer) between the bottoms of the handles to show that gap, then you remove the card and immediately crush the gripper shut from that wide starting position. This is the required starting position for official Captains of Crush certification attempts on the #3 and #4 grippers, so “credit card close” basically means you closed the gripper from that certification-legal width. Train credit closes from the beginning.
Do I need every CoC level, or can I skip some?
You do not need every level. The most effective approach is owning three adjacent grippers: one slightly below your working level for warmups and high-rep volume, your working gripper, and your goal gripper one level above. Skipping multiple levels means your goal gripper is too far out of range to use productively for negatives and partial work.
Is the IronMind #3 certification worth pursuing?
If closing the #3 is your goal, yes. The certification provides a concrete, objective standard to train toward - the same rules used since 1991, administered worldwide. As of 2026, just over 200 athletes have been certified, including elite competitors like Brian Shaw, Magnus Samuelsson, Jedd Johnson, and Andrew Durniat. It is the only widely recognized standard for this level of achievement in grip sport.
How does hand size affect CoC progression?
Hand size affects mechanical advantage at different points in the close - larger hands generally find initiation easier, while the final inch can be harder for athletes with smaller hands due to reduced leverage. However, hand size is not a ceiling. The certified #3 list includes athletes across a wide range of anatomies. Technique and programming matter more than hand size at every level below the #3.
The System Works - Stay in It
Whether you are closing your first Guide or chasing IronMind certification on the #3, the key is patience, structured programming, and the right equipment at every stage. Explore the full range of Captains of Crush grippers, chalk, extensor bands, loading pins, and wrist rollers to build your toolkit as you progress. The equipment is part of the program, not a luxury upgrade.