Templaco ST-161G Strike Template Only 1-1/4" x 4-7/8", ASA "T" For Wood Doors And Jambs. Templates Nail Into Edge Of Door Or Jamb. 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). With Router & A Template Guide, These Rout Out The Latch Or Strike Plate On Wood Doors & Jambs.