Bosch 1/2-in High-speed Steel Hinge Mortising Router BitAdditional chip clearance for fast mortising Control cut design helps minimize kickback Balanced cutting with minimal vibration Use with hinge template and templet guide for optimal results Useful when good chip clearance is important Features Bit Style Hinge mortising Number of Flutes 2 Overall Diameter 1 2 in Cutting Edge Length 3 4 in Bit Shank Diameter 1 4 in Overall Length (Inches) 2. 25 Warranty 1 year limited Sub Brand N A CA Residents: Prop 65