4 Pieces Dumbbell Clamp Ring Collar, 30mm Dumbbell Clamps, Dumbbell Collar Clips, Barbell Collar Locking Ring Release Dumbbell Lock Clamp Lock Barbell f26 Premium MaterialMade of high quality nylon and ABS, our dumbbell clips are long service life, sturdy and durable and not easy to break, giving you good protection for your dumbbell. > Easy to UseQuick lock and unlock, just open and close the sliding bar, which can be installed/disassembled easily and quickly. Holds tight and won't slip. Wide ApplicationsQuick release dumbbell collar clips are suitable for training, overhead press, weightlifting and other sports. Widely used for home, gym and outdoor activities etc. Package includesYou will get 4 black quick release clips. The diameter of each dumbbell clip is about 30mm (1.18 inch), just the right size fits easily. Satisfied Customer ServiceIf you have any problems during use, do not hesitate to contact us. We will contact you within 24 hours and provide you with a satisfactory solution. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and color. display, there will be a certain color difference, depending on the physical object received.