Description: Industrial Quality Router Bits C3 Micro-grain Tungsten Carbide Cutters Solid Hardened Steel Bodies with Anti-Kickback Design Build-up & Heat Resistant Coating Widely used by the connection of wooden doors, wooden frame, cabinet box mortise, can put the different colors of wood together. Specification: Material: Carbide Color: Yellow Size: Approx. (1/2"*1/4") Hole Diameter: 6.35mm/0.25inch; Handle Diameter: 12.7mm/0.5inch; (1/2"*3/8") Hole Diameter: 9.52mm/0.38inch; Handle Diameter: 12.7mm/0.5inch; (1/2"*3/4") Hole Diameter: 19mm/0.75inch; Handle Diameter: 12.7mm/0.5inch; (1/2"*1/2") Hole Diameter: 12.7mm/0.5inch; Handle Diameter: 12.7mm/0.5inch; (1/2"*5/8") Hole Diameter: 15.9mm/0.63inch; Handle Diameter: 12.7mm/0.5inch Package Includes: 1 piece Beading Router Bit Note: Pls allow an error of 1-3mm due to the difference of manual measurement.