ERGO ladder rail covers are the original Picatinny rail cover, and still one of the best available. Taking up the smallest amount of space, the ladder rail covers protect Picatinny rails from damage, as well as other gear and the shooter from sharp edges. When installed, Ladder Rail Covers provide a comfortable, secure grip. Each Ladder Rail Cover goes over 25 slots, with 3 Ladder Rail Covers to a pack. Mfg: Ergo Grips