Zoo Hardware Vier Precision Euro Profile Offset Cylinder Turn is designed for high security. Features include Anti Drill Cylinder Anti Pick Cylinder and a Break off system. It meets safety standards BS EN 1303 Fire door 30 60 and BS EN 1634 1. This cylinder comes with a Polished Chrome finish. Each unit is supplied with 3 specially manufactured hardwearing Silver Nickel Keys as standard. This variant is Keyed To Differ meaning a single cylinder with an individual key pattern.