GD Grip Ultra 70, Adjustable Hand Gripper, Hand Strengthener (55 to 154 lb : Ultra 70) *GD GRIP ULTRA is protected by PATENT issued by the US government(PATENT NO. US 8,133,158 B2) and CHINA government(PATENT NO. CN101808698B) The GD Grip Ultra 70 is a top of the range, adjustable hand gripper developed for professional athletes and everyone else. The resistance can also be adjusted between 20 and 70kg (44 to 154 pounds). Its care for width is adjustable between 45 to 85mm. These combinations enable the user to make a choice from 17 different resistances. Steel and hard industrial plastic parts provides an a top quality gripper at a reasonable price Four Link structure provides muscle development of not only the fingers and the hands but also from the wrist down to the elbow.