Big Horn 70163 3-1/2 Inch Hinge Template, Single Pocket, 5/8 Inch Radius Corner Replaces 351-KF. Like our full-length templates, these single-pocket router templates will produce exact hinge mortises on both door and jamb. Each template has two adjustable stops on the back of the template to work with different door thicknesses. Match an existing layout or create your own hinge spacing by simply moving the template.