This finish size of 1-1/2” x 4” is common for the electric door jamb switch used in several applications. Just like all of our Router Templates, use a 5/8” outside diameter router template guide on your router and a 1/2” hinge mortising bit with this template. See our model TG-1 Router Template Guide and our CB-1 or CB-4 Hinge Mortising Bits, both are Featured Items on our Home Page

Stock Number: ST-166