Description: 【Spring Hand Grip Strengthener】: This hand grip strengthener is made from PP and steel spring, sturdy, durable yet lightweight and resilient; its thickened steel spring provides powerful force without easily snapping. 【Ergonomic Design】: The Z shaped design fits comfortably in the palm of your hand, ensuring balance force distribution. It scientifically accommodates the strength of four fingers and the palm, providing an effective workout. 【Anti Slip Texture】: The grip strengthener features an anti slip design for a comfortable grip that won't slip out of your hands during use. 【Compact & Portable】: With dimensions of 9.4*7cm, this hand grip trainer is small enough to carry around with you wherever you go for convenient use anytime. 【Wide Application】: It's great for hand exercises, scientifically accommodating finger strength. suitable for wrestlers, athletes, musicians, muscle builders, and exercise trainers, whether they are beginners or professionals. Specification: Material: PP Size Chart: 9.4cmx7cm/3.70inchx2.76inch Package Includes: 1 Hand Grip Strengthener(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.