Description: The new design can simulate a wrist wrestling match and train your upper body muscles in a fun process. Designed with 4 suction pads, easy to stick to any clean surface, easy to remove, strong adsorption force, stable performance. With electroplate processing, rust-resistant, does not rust, made of carboon steel spring, the strength is about 100lbs. Develop a pair of strong forearms can make you perform better in many sports, start training anytime, anywhere. Suitable for office workers, ball sports, family members, students, fitness people. Specification: Material: Carbon Steel + Plastic Type(Optional): Black Light Weight Type: 21.5x21.5x36cm/8.46x8.46x14.17inch Silver Light Weight Type: 21.5x21.5x36cm/8.46x8.46x14.17inch Black Heavy Weight Type: 21.5x21.5x36cm/8.46x8.46x14.17inch Silver Heavy Weight Type: 21.5x21.5x36cm/8.46x8.46x14.17inch Package Includes: 1 Piece Arm Wrestling Exerciser Note: 1. When in use, the upper wrist strap of the exerciser must be covered on the wrist. When the hand slips unexpectedly, the wrist strap can serve as a buffer protection. 2. Hold the exerciser tightly with your hands, bend your elbow joint around 90 degrees, keep your upper body upright, and keep your head away from the exerciser. In this posture, bend the arm to the left or right (right or left hand) while maintaining a safe distance from the surrounding crowd. 3. Do not use this exerciser if your hands are sweaty or oily, soapy, etc. are not cleaned. The exerciser may cause bodily injury when it suddenly slips out of wet hands.