CMT 801.817.11B Mortising Bit with 1-1/4-Inch Diameter with  1/2-Inch Shank 1-1/4-Inch Cutting Length, 2-31/64-Inch Overall Length 2 Hi-Density Carbide cutting edges and negative shear angle design for long-lasting performance Mortise perfect hinges with no splintered edges or rough bottoms Fits most popular mortising jigs