The EG4373-3PK Ergo Grip 18-Slot Ladder LowPro Rail Covers protect rail areas from damage and shield the operator from sharp rail edges and prevent damage to gear such as rapelling ropes that may be abraded or cut by uncovered rail sections. Sold in three packs. Unified in the mission to provide military, law enforcement, citizens and shooters with the finest mission enhancing firearms accessories available, the people of ERGO have grown their business through a combination of precision manufacturing and exemplary customer service. All ERGO products are 100% manufactured in the USA to the highest standards and the tightest possible tolerances. Expanding far beyond industry standards, every ERGO product is backed by a comprehensive satisfaction guarantee.