The TKO Strength & Performance Lock-Jaw Pro Collar is ideal for serious lifters, high-impact workouts and anytime bumper plates are used in a bar. The spring-loading snap-latch and larger lever keep the collars closed tight to make sure your weights remain secure during your workouts. The injection-molded resin frame protects the bar and plates from damage, and the elastomer pads grip to the bar with ease. TKO Strength & Performance Lock-Jaw Pro Collar - Free Weights/Bulk at Academy Sports