DescriptionUltra-high-strength engineering plastics and super firm anti-corrosion plating spring, which guarantee a longer life of this forearm developer. Thicken the sponge so you won't get hurt during training. Finger shape design, more suitable for grasping this exerciser. Beautiful appearance, moderate size, easy to carry, and can be adjusted at any time.Features- Color: Black - Material: Rigid plastic - Size: 22.5 x 14cm - Ultra-high-strength engineering plastics and super firm anti-corrosion plating spring, which guarantee a longer life of this forearm developer. - Thicken the sponge so you won't get hurt during training. - Finger shape design, more suitable for grasping this exerciser. - Beautiful appearance, moderate size, easy to carry, and can be adjusted at any time. Strengthen your forearm and wrist force anywhere.