Material: The dumbbell lock is made of strong ABS plastic and spring steel, strong and durable, not easy to deform. It can provide stable and firm support for your weightlifting bar. Easy to install: Simply press the spring lock of the training device and release it, the dumbbell lock can be adjusted smoothly. So that the bumper can be held in place and does not slip. Useful: Fits all typical barbell bars. Provides a smooth training process to help you control your weight through firmness and stability and reduce the likelihood of accidents during weightlifting.Applicable Crowd: The spring lock is suitable for men and women who often perform strength training, improving your balance, coordination and flexibility. Widely Used: Spring Clips for Dumbbells Suitable for home use, multi and all commercial gym equipment. Used for weightlifting, fitness, strength training, strength training, triceps exercise machine, etc.