Easy Installation: Simply Tap The Spring Lock On The Exercise Device and Let Go. Spring Lock for Dumbbells, Ultra-Soft Protective Cover, Easy Assembly and Disassembly and Time-Saving. Make Sure You Have A Firm Grip So That The Fabric Finger Can Be Held In Place and Won'T Slip. New Accessories for Fitness Equipment: Our Dumbbell Clamps, Clean and Hygienic, Environmentally Friendly and Odorless. It Is Convenient and Quick to Assemble and Disassemble. Make Fitness Easier. Applicable Audience: Our Spring Lock for Dumbbells Is Suitable for Men and Women Who Frequently Do Strength Training In order to Improve Their Balance, Coordination and Flexibility. Widespread: These Spring Locks, Dumbbell Locks, Are Used for Weightlifting, Fitness, Strength Training and Triceps Training Equipment, Etc. The Snap Lock Fits Many Different Barbell Bars with A Diameter of 30 Mm.