Robert Baraban Adjustable Hand Gripper. This is a must have for serious grip athletes. Over 50 adjustments that range from easier than a RB70 to harder than a RB400! Two springs of differing tension allow you to choose resistance levels from 50 to 500lbs. Solid steel and built to last. The perfect trainer to reach your hand gripper goals!

Complete RGC calibration for RBA gripper CoC comparison levels

Weak Spring

• 1-1 = 11.4 kg
• 1-2 = 13.2 kg
• 2-2 = 14.6 kg ( ~ CoC Guide )
• 2-3 = 16.2 kg
• 3-3 = 17.9 kg ( ~ CoC Sport )
• 3-4 = 19.8 kg
• 4-4 = 21.9 kg
• 4-5 = 23.3 kg
• 5-5 = 25.7 kg
• 5-6 = 27.2 kg ( ~ CoC Trainer )
• 6-6 = 30.5 kg
• 6-7 = 32.8 kg
• 7-7 = 35.4 kg
• 7-8 = 37.9 kg ( ~ CoC 1 )
• 8-8 = 40.3 kg
• 8-9 = 42.2 kg ( ~ CoC 1.5 )
• 9-9 = 45.6 kg
• 9-10= 47.0 kg
• 10-10 = 50.8 kg ( ~ CoC 2 )

Hard Spring

• 1-1 = 28.1 kg ( ~ CoC Trainer )
• 1-2 = 31.4 kg
• 2-2 = 34.8 kg
• 2-3 = 39.3 kg ( ~ Hard CoC 1 )
• 3-3 = 43.7 kg ( ~ CoC 1.5 )
• 3-4 = 47.6 kg
• 4-4 = 52.4 kg ( ~ Hard CoC 2 )
• 4-5 = 57.3 kg ( ~ CoC 2.5 )
• 5-5 = 62.1 kg
• 5-6 = 66.7 kg
• 6-6 = 72.8 kg ( ~ Hard CoC 3 )
• 6-7 = 76.7 kg
• 7-7 = 82.1 kg ( ~ CoC 3.5 )
• 7-8 = 88.1 kg
• 8-8 = 92.4 kg
• 8-9 = 97.2 kg ( ~ CoC 4 )
• 9-9 = 103.9 kg
• 9-10= 109.4 kg
• 10-10= 114.3 kg

WARNING: Training with hand grippers is extremely addictive! They will be hard to put down, resulting in overtraining and possibly extreme hand soreness.

Don't neglect extensor training.

Extensors are the muscles on the back of the forearm involved in opening the hand and are extremely important to hand health and strength. Wrap a thick rubber band around the ends of your fingers and open your hand for as many reps as possible.