Yale Doormaster™ Adjustable is a high-security lock designed to replace up to 90 of PVCu door locks with top and bottom hooks or bolts a 35mm backset and a 16mm faceplate Its adjustable design utilises the latest patented technology from Yale to ensure the lock is installer friendly making it the ideal choice where a higher level of security on a PVCu door is required 3 hooks ensure high security and anti-separation Adjustable rollers create a weather tight seal to protect the interior of a house from the elements The Yale Doormaster™ Adjustable is supplied with pre-assembled keeps using the patented Uni-packer system for fast easy and reliable installation Tested to Police Approved Secured By Design standard and PAS 24 door set capable 10 year guarantee