Yale Doormaster Professional is a High Security replacement lock. With three hooks and two rollers, the Doormaster Professional has been tested to the Police Approved Secured By Design standard and is PAS 24 door set capable. About this item The Yale Professional Doormaster is a cost effective high security replacement Multi-Point Lock that fits the majority of PVCu, Composite and Timber doors Installation requirements: The lock comes in three pieces, therefore it requires Professional installation Door Type: Designed to replace almost all UK Timber and Composite door locks Dimensions: The replacement lock has a backset of 45mm, faceplate of 16mm and the centre of 92mm. The upper reach is between 385-820mm and the lower reach is between 408-845mm Pack includes: 3 unassembled pieces with adjustable rollers for weather-proofing, central gearbox with hook and fixing tabs for easy fitting Features: 92mm centres 45mm backset 16mm faceplate variants Crop to size for maximum adjustment Adjustable rollers for compression & weather proofing 3 x high security anti-separation hooks YS170 centre gearbox Supplied with pre-assembled keeps using the patented 'Uni-packer' system for fast, easy, and reliable installation on PVCu doors Specialist easy flush fit keeps provided for timber or composite installation Designed for installation by professionals Fixing tabs for easy and secure fitting Rounded ends for safe installation Supplied with split handle spindle for optional night latch function