From the Manufacturer
Designed not only to rout the strike and latch plate, but to help align them perfectly and with ease. The gauges at both ends of the template automatically align the latch plate in the center of the door. They also align the strike plate on the jamb to the exact setback. Designed to fit over a door stop or rabbited jamb and still rout the strike plate in the proper position. Made .049 in. thicker than the hinge template to avoid resetting the router depth for the strike plate. Made of high impact ABS and fiberglass, and if nicked by the router it may be patched with ABS cement. A corner chisel guide to square corners is included.