[High quality material] The dumbbell strap is made of ABS plastic, strong and durable, not easy to break, the plastic is very light and will not add any weight to your workout. [Widely Used] The dumbbell curl is suitable for weightlifting, fitness training, strength training, body shaping, anaerobic exercise, orientation and other sports. It is generally used for the formphysical and daily training. [Easy to use] The dumbbell buckle is equipped with the quick locking and unlocking operation of the dumbbell collar clip, which is very convenient for one-handed assembly. It can be easily opened and closed with one finger,and the installation time is very short. [Safety Design] There is a rubber ring inside to ensure it is tight and not easy to loosen or slip off for maximum safety during strength training. [Product Details] There are 2 red and 2 black dumbbell loops in total. The inner diameter of each dumbbell loop is approx. 28mm\/1.1inch, which is enough for your daily use. 1. The dumbbell clip is made of high-quality ABS and has a long service life. 2. It is more convenient and faster to disassemble, and it is very convenient to open and close with one button. 3. Suitable for daily weight lifting, strength training and other sports. Attention Due to the different measurement methods, there may be an error of 1-3mm. S Specification Inner diameter: 28.0 mm \/ 1.1 inch Color: Black+Red Weight: 50 g\/pc. Material: ABS Assortment 2 x barbell clamp (black) 2 x barbell clamp (red)