Yale Doormaster Adjustable Hook Multipoint Lock

The Yale Doormaster Adjustable Hook Multipoint Lock is a versatile replacement mechanism designed specifically for UPVC doors. It serves as a functional solution for replacing legacy or obsolete locks where original parts are no longer available, without the requirement for extensive door modification.

The upper and lower hook positions have extendable reach. The manufacturer specifies three separate keeps with the Uni-Packer system, not the one-piece keep supplied with the Universal model. Compare the door preparation and fit the appropriate supplied keeps; this does not promise reuse of the original frame keeps.

Typical applications include domestic residential doors where the primary locking mechanism has failed. The latch and hookbolt configuration provides a robust mechanical closure, while the split spindle capability allows for various handle functions, including external key-only entry. It is designed to work with standard 16mm faceplate preparations and Euro profile cylinders.

Replacement measurements: this model has a 35mm backset, 92mm centres and a 16mm faceplate. The manufacturer lists upper reach of 520-860mm and lower reach of 545-875mm; use the datum positions in the stored diagram. Its extendable construction differs from the crop-and-mate Professional range. There are three hooks in total, including the central hook.