The package includes: 4 standard dumbbell bar self-locking collars, enough to meet your daily use and replacement needs, allowing you to enjoy sports with confidence. Material: Made of plastic material, non-toxic, smooth, strong, and can be used for a long time. Easy to use: The dumbbell screw clamps the rubber edge anti-skid tightening ring to ensure that it is firmly and safely fixed to the dumbbell or barbell bar. The smooth profile fingertip handle ensures that the dumbbell or barbell can be installed and removed quickly and easily. Safe use: The dumbbell rotating lock collar can safely and reliably hold the weight plate when lifting. It is very suitable for the use of anti-collision boards and platform lifting exercises. Wide range of uses: Our rotating lock ring clip is suitable for barbells, dumbbells, weightlifting, etc. It is easy to carry and suitable for taking to the gym or exercising at home. Description: Material: Plastic Quantity: 4 Colour: Black Activities: Gym and training, weightlifting Department: Unisex adults Package: 4 x Dumbbell rotation lock collar