Feature: 1. Provides comfortable grip, and simply slides in and out of the weight bar. 2. The unique protective chrome surface and double ring steel design can fix the bumper in place. 3. Does not slip during exercise. Very suitable for home exercise, push-ups, fitness, benching. 4. Simple and effective, ensuring that the bumper and the plate are kept in the proper position on the barbell, with strong grip. 5. Hard to rust, durable, easy to assemble and disassemble, easy to exercise. Specification: Condition: 100% Brand New Item Type: Dumbbell Spring Lock Material: Metal plating + plastic handle Color: As picture shownHandle length: Approx. 40mm/1.6in Optional Size(inner diameter): Approx. 28mm/1.1in, 30mm/1.2in, 50mm/2in28mm and 30mm type length: Approx. 85mm/3.3in 50mm type length: Approx. 115mm/4.5in . Package List: 4 x Dumbbell Spring Lock