Description Made from solid steel with plating finish, the dumbbell handles are heady duty and durable. Ring inside collars, collars stay tight, knurled handle prevents slipping. Easy and quick to swap plates with the spinlock collars. An economic and convenient way to realize fitness training without leaving your home. The knurling on the bar allows your hand to grip the bar securely. Features - Color: Silver. - Size: 5.00 x 5.00 x 3.00cm/ 1.97 x 1.97 x 1.18 inch. - Material: iron. - Iron material, plating process, shiny silver color, solid, thickened, durable and not easy to rust. - Double lock design to prevent weight plate (not included) from shaking and coming off. - Barbell clamps can keep weight plates placed securely and safely while lifting. - Standard barbell spinlock collars screw clamp dumbbell bar weight lifting. - Suitable for weight lifting barbells dumbbell bars training gym sports, including workouts, overhead press, dead lifts, bench press.Package list4 x barbell lock collars