The Zoo Hardware Vier Precision Euro Profile Offset Cylinder & Turn is designed for enhanced security and durability. It features an anti-drill and anti-pick cylinder for robust protection against tampering. This cylinder meets BS EN 1303 standards for fire door performance, specifically rated for 30-60 minutes, and also complies with BS EN 1634-1. The break-off system provides an additional layer of security. The cylinder comes with a satin chrome finish and is supplied with 3 specially manufactured, hardwearing silver nickel keys as standard. Keyed Alike and Master Suites are available for customized security solutions, allowing multiple cylinders to be opened by the same key or a single master key. Please note that custom orders for Keyed Alike and Master Keyed options are made to order and cannot be cancelled or returned. It is recommended to measure your existing cylinder before ordering to ensure correct size selection. Master keys are sold separately.