For template Use with specified jigs.#45484, diameter (D): 1/2, cut depth (a): 1/16, cutting Height (B): 3/8, shank (D): 1/4, overall length (L): 2-1/2, replacement bearing: 47712, jigs: replacement for, Porter cable bit, #43671 one piece. For Mortising of doors to accept hinge butts, with Porter cable kit model #59370, flutes: 2 D1: 5/8 45484 carbide Tipped flush trim plunge template 1/2 dia x 3/8 x 1/4 inch Shank with oversized upper ball bearing