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These ball type hand knobs feature a steel threaded insert with 1/4"-20 threads
Fewer moving parts means less chance for error and cleaner
professional-looking results every time
1 dovetail bit (7°) with guide bearing (#1533)
Any 1/2" cutting diameter bit with a 1/2" shank will work
Amazon Invisible Concealed Hinge Templates T-slot These ball type hand knobsOur two step Hinge Jigs are the fastest, easiest and most accurate way to rout the two step mortises required for invisible hinges. Made of 1 2" phenolic for heavy duty use, they measure 5 5 8" x 11 5 8" for maximum router support. Includes an 8" Double Track for mounting the jig and clamping to your work (no holes are drilled into your door). Clamps not included. 8706 is for a 25mm wide x 150mm long shallow mortise, with a 121mm long deep mortise.