Captains of Crush Hand Grippers come in 11 strengths, so whether your grip strength sizes up as XS or 3XL, there is a Captains of Crush gripper perfectly suited to your requirements. CoC Guide c. 60 lb. For beginners, seniors, rehab, and easy warm-ups. CoC Sport c. 80 lb. For teenage athletes, weekend warriors, strong guys who like light warm-ups.