The Captains of Crush (CoC) Hand Grippers by IronMind are some of the most respected and challenging grip-strength tools available. They’re widely used by athletes, climbers, strongmen, martial artists, and anyone looking to improve crushing grip power.
Key Features:
- High-Quality Construction: Made from heavy-duty steel springs with aluminum handles (some models have stainless steel handles).
- Adjustable Resistance: Available in multiple resistance levels ranging from Sport (80 lbs) to No. 4 (365 lbs).
- Certification Standards: Officially certified grippers ensure consistent resistance levels.
- Compact & Portable: Easy to carry for training anywhere.
- [Amazon](https://www.amazon.com/s?k=Captains+of+Crush+Hand+Gripper)
- [IronMind’s Official Site](https://www.ironmind.com/)
Popular Models & Resistance Levels:
| Model | Resistance (lbs) | Recommended For |
|——-|——————|——————|
| Sport | 80 | Beginners, rehab |
| Trainer | 100 | Novices |
| No. 1 | 140 | Intermediate |
| No. 2 | 195 | Advanced |
| No. 3 | 280 | Elite (certification standard) |
| No. 4 | 365 | World-class grip strength |
Where to Buy?
You can find them on:

Training Tips:
1. Start with a gripper you can close for 5–10 reps before progressing.
2. Train grip 2–3 times per week to avoid overuse injuries.
3. Use techniques like “negatives” (slowly releasing a closed gripper) for strength gains.
4. Combine with other grip tools (pinch blocks, thick bars) for balanced hand strength.
Would you like recommendations based on your current grip strength level?




