4pcs Self-Locking Barbell Nuts Anti-Slip Dumbbell Lock Collars for Secure

Cast iron; Barbell locking nuts--the product is easy to install and remove, providing added convenience for users, barbell supply; Dumbbell bar locking nut--the use of cast iron materials in its construction its durability and long-lasting performance, universal dumbbell locking nut; Barbell bar nut--made from durable cast iron materials that resist wear and tear, these self-locking nuts are designed to withstand the test of time, universal dumbbell nut; Barbell screw cap--compatible with a wide range of barbells and dumbbell bars, this self-locking mechanism provides added safety and security during your workout routine, self-locking security nut; Dumbbell anti-slip nut--the installation and removal of the product is easy and convenient, providing added convenience for users, barbell self-locking nut

What's in the box
4 x Nails, Screws & Fasteners