The spring force can be adjusted from 5 to 165 kg by turning the knob. The spring force can be adjusted from 5 to 165 kg by turning the knob.<br> ABS high-strength engineering plastic, durable and no deformation. ABS high-strength engineering plastic, durable and no deformation.<br> The adjustable gripper was designed for professional athletes and sports fans. The adjustable gripper was designed for professional athletes and sports fans.<br> The robust tool spring reduces the stretching and deformation of the spring and increases the service life of the product.<br> Hold for 5 seconds and perform 20 sets in a row to ensure the workout is effective.It is also the auxiliary device for the rehabilitation training of patients with hand muscle or soft tissue contusion.<br> Descriptions:-The adjustable gripper is designed for professional athletes and sports fans.-Gripper uses perfect construction and is a simple oneStructure.-A strong compression spring and a non-slip handle.-Compressed padding for extra comfort and streamlined design, equipped with closure straps.-ABS high-strength technicalPlastic, durable and no deformation.-The sturdy tool spring reduces the stretching and deformation of the spring and increases the service life of the product.-The plastic handle fits the ergonomics.Anti-slip and safe.-With exquisite and lightweight character, it can be worn to exercise at any time.-The spring force can be adjusted from 5 to 165 kg by rotating the knob.Do not loosen your grip immediately after holding it.-Hold for 5 seconds and perform 20 sets in a row to ensure the workout is effective.It is also the auxiliary device for the rehabilitation training of patients with hand muscle or soft tissue contusion.