ITEM NAME:2pcs Pull Up Arm Strength Training Ball Hanging Strap Upper Body Exercise Gear Description: Functional: Anti-slip grip ball and hanging strap increase forearm, grip strength, boosting endurance, climbing training and explosiveness High Quality Material: Non-slip textured spherical PU material provides maximum grip Easy to Install: Come with stainless steel hooks and reinforced straps for convenient using Without place restriction: Can be attached to any pull up bar, including door jamb, rack system pull up bars or can be used with pinch grip loading pin Specification: Material: PU, Stainless Steel, Nylon Ball Diameter: 7.3cm/ 2.83inch Strap Length: 26cm/10.24 inch Hook Length: 9cm/ 3.54 inch Package Includes: 2 Pieces Balls 2 Pieces Straps 2 Pieces Hooks SKU: DMO0001932454048151.Functional: Anti-slip grip ball and hanging strap increase forearm, grip strength, boosting endurance, climbing training and explosiveness. Material: PU, Stainless Steel, Nylon. High Quality Material: Non-slip textured spherical PU material provides maximum grip.