SportMonster Fitness Master Hand Grip Strengthener with Adjustable Resistance from 20 to 90 lbs Adjustable Resistance & Ergonomic Design:-- Perfect hand trainer, the dial can easily adjust the resistance from 30-145lbs. The Hand Gripper is ergonomically designed and suitable for all age groups and any hand sizes. Perfect for athletes, fitness and s Ideal Rehabilitation and Exercise Equipment:-- Excellent hand strength excises for people who have Arthritis, Tendonitis, Carpal Tunnel, and those who are recovering from a tendon surgery. Ideal hand and finger exercise and rehabilitation equipment. For Portable & Lightweight:-- The grip handle is small enough to fit into your gym bag or pocket. You can enjoy exercising during work or leisure. Exercise your hand anywhere and anytime. High Quality & Comfortable:-- Comfortable rubber non-slip handles and top quality design with stainless steel extension springs. Durable and safe, it will not damage your hands and fingers. 100% Quality Warranty:-- We offer lifetime quality warranty and refund policy to insure you could buy it without any concerns.