Lock-Jaw Pro 2" / 50mm Olympic Barbell Collar, Weight: 13 ounces / set The Lock-Jaw Pro Barbell Collar is an ideal choice for all bumper plate workouts. An easy to use permanent snap-latch keeps the collar secure throughout your most brutal workouts. 10x stronger retention force than traditional spring collars, the Lock-Jaw Pro will help prolong the life of your bumper plates. The Lock-Jaw Pro Collar features a solid-core injection molded nylon resin frame and injection molded pressure pads, making it nearly unbreakable! One hand installation and removal is easy with the large locking lever. A permanent spring snap-latch keeps the collar secured on the bar through the most brutal workouts. Innovative design, superior durability, and exceptional performance make the Lock-Jaw Pro Collar an excellent choice for CrossFit and all bumper plate workouts. Lock-Jaw Collars will help prolong the life of your bumper plates by keeping them secure throughout your workout. SPECIFICATIONS WEIGHT 13.0 Ounces (0.80 lb per set) DIMENSIONS 3.0" H x 3.5" W x 2.0" D MATERIAL Proprietary Nylon Resin U.S. PATENT #7,513,856 MFG WARRANTY 1 Year MASTER CARTON 50 Sets