Product Size: Grip: 11 * 17 * 2cm Pointer: 9 * 7.5 * 2.2cm Five finger circle: 7 * 7 * 3.8cm Egg ball grip: 5.8 * 4.1cm Concave-convex grip ring: 6.8cm in diameter Color: black, blue Material: PP+ABS Package content: 1 set of gripper (5pcs) 1.Smart Counting Grip Strengthener Add counting function, our hand strengthener could record your exerciser number every time when you use it.Just Press the button to count automatically. So you can know better your training progress and training results with counting number. 2.GRIP STRENGTHENER TRAINER KIT - 5 PACK: The Kit included 1 adjustable hand gripper Strengthener ,1 finger stretchers 1 finger exerciser,1 hand strengthener grip ring , 1stress relief grip ball. 3.Easy-Adjustable ResistanceEasy to adjust the resistance from 10-130lbs as needs. The hand Gripper is suitable for everyone, like Athletes, sports, fitness coaches, fitness, musicians and people who want to exercise their hand, wrist and fingers. 4.Suitable for Everyone: Its hand grip range is between 5-60kg.Fit for small and large hands, seniors and teensathletes musicians See results fast using your hand exercise equipment. 5.HIGH QUALITY MATERIALS NO RISK PURCHASE:Hand grippers use high quality stainless steel spring, durable and long lasting. Rubber Covered Handle The handle is covered with TPR, which is relatively soft and wont hurt fingers.Unconditionally refund or resend with any problems, friendly customer service.