Bosch 85636M 1-1/4 In. x 5/8 In. Carbide Tipped Lock Mortising Bit Use with 82816 for 1/4 In. shank, and use with 82818 for 1/2 In. shank Use with hinge template and template guide for optimal results Additional chip clearance for fast mortising Control cut design helps minimize kickback Balanced cutting with minimal vibration