The Croc Lock™ Collar is extremely versatile and durable. Normal collars get broken so easily, not the Croc Lock™ Collar. It is molded from a strong but flexible thermoplastic rubber material that will last and is surrounded by an easily replaceable band of durable high-denier nylon webbing with integral Velcro straps for ease of use so after years of use you can refurbish your collars back to new. These collars fit any bar including specialty and pipe bars. Croc Lock™ Collars are extremely versatile.