Item Type: Bottom Cleaning Bit Material: Carbon Steel Body + Alloy Cutter Head Specification: Shank Diameter: 1/4in Shank Cutter Head Diameter: 3/4in Blade Depth: 1/4in Package List 1 x Bottom Cleaning Bit 1 x Storage Box 1MAIN PURPOSE: The bottom cleaning bit is very suitable for door hinge mortises with hinge template. 21/4IN SHANK: The milling cutter bit has standard 1/4in shank, which can be installed on most electric milling tools. 3EXCELLENT MATERIAL: With alloy blade and carbon steel body, it is hard and wear resistant and can be used for a long time. 4CLEAN CUTS: The hinge mortising router bit can mill clean cuts for hinges or other shallow cut projects. 5WIDE APPLICATION: Commonly used in the processing of wooden door frames, cabinets and boxes, etc., suitable for solid wood, MDF, particleboard, etc.