The L key insert for mortise locks is a high quality security hardware element. Designed to fit perfectly into mortise locks, this insert is prepared to accommodate a Euro profile cylinder, ensuring extensive compatibility with many locking systems; Reinforced safety: The robust design and nickel-plated finish provide superior resistance against break-in attempts; Easy to install: Comes with a detached M5 x 60 headpiece screw, installation is simplified, allowing for quick and efficient installation This insert is mainly used in residential and commercial door locking systems, providing increased security for properties and properties; Insert dimensions are designed to fit mortise locks. Type 3 Fencing;, Weight: 0.110231131 pounds, Manufacturer: cyclingcolors