Bridle Rings, thread 1/4"x20, Size 1-1/4", High-Quality steel for strength and durability. Supports hanging cables both horizontally and vertically. Easily attached to any 1/4"x20 mounting hardware, cUL Listed; 100 piece / inner box. Simply45 Bridle Rings provides support for all Simply45™s non-data sensitive cabling needs. They provide a fast and cost-effective way to support voice, data, and video cables. The circular portion of the ring has an open loop for easy cable insertion. Simply45™s all-steel construction with zinc plating provides durability, and resistance to corrosion for years of worry-free service.