This product boasts premium nylon construction for durability and ease of use. With a simple one-hand install and Spring powered Snap-Latch design, you'll feel secure during your workouts. Whether you're into CROSSFIT, strong lifts, powerlifting, or any other fitness routine, these Barbell Locks are must-have for both home and professional gyms. Available in various sizes to fit screw and smooth type bars. Note: Color may vary slightly from pictures and slight measurement differences may occur.