All Templaco Templates Are Designed To Be Used With A 1/2" Mortising Bit (Bos 85249), * 5/8" Outside Diameter Router Template Guide (Por 42045) And Template Guide Nut (Por 42237) * 1" X 2-1/4", For Wood Doors And Jambs, Not For Use On Automated Machines * These Templates Rout Out For The Latch Or Strike Plate On Wood Doors And Jambs