We Live to Protect, so dont leave your firearm rail unprotected. A nicked or dinged gun rail can create an inconsistent mounting surface for your optics, and the rails themselves can be sharp. So protect yourself and your gear with Sentry's low-profile rail covers in a high-performance, non-slip design. Sentry Keymod rail covers use the patented Wedgelok technology to hold it securely to your hand-guard. When installing simply press each section firmly into each Keymod slot. Once the Wedgelok is in place it will expand and lock in behind the hand-guard. Spans 7 KeyMod slots for convenient installation and can be cut down for shorter lengths to fit around optics or hand stops.