SPECIFICATIONS Diameter: 2" Cutting Length:: 7/8" Angle: 45 degrees Shank Diameter: 1/2" Total Length: 2-11/16" Craftex Blue Tornado bits are CNC machined to have perfect balance and leave a smooth finish. All bits are manufactured from 4140 & 5140 steel and are put through a special heat treatment process to ensure proper hardness and tensile strength to prevent bending or breaking.