Versatile: Suitable for front doors, apartment doors as well as timber, aluminum and most UPVC doors Emergency and danger function: Enables the lock to be opened from the outside, even if a key is inserted inside High level of protection: Drilling protection and hardened steel spring prevent forced opening Tamper-proof: Paracentric key profile provides effective protection against picking Safe, reliable and stable. This is what the name ABUS stands for. Whether it's home protection, property security or mobile security: ABUS sets the standards