Ladder Rail Protectors prevent damage to gear, such as rappelling ropes, that may be abraded or cut by uncovered picatinny handguard rail sections. The Santoprene Magpul Ind. Ladder Rail Handguard Covers provide a smooth no snag rubbery surface for an even low profile hand grip and improved weapon control. Ladder rail protectors are  Easily cut for custom fitting. Each Ladder Rail Protector covers 17 slots of your picatinny rail handguard.