Extended flush cut pattern router bits can smooth wood cutting, work for slotted and wood screw holes; Made of solid hardened steel and micro-carbide C3 grit, high hook and shear angles allow burs to slice smoothly; Shank: 1/4"/ 6.35mm; Blade length: 2"/ 50mm, 3" / 76mm; Blade width: 3/8"/ 9.52mm; Widely used for wood, MDF, particle board, plywood, panels, softwood and other smooth surface synthetic wood processing workers; Wood cutter designed for portable and desktop woodworking engraving machine design, can not be used in electric drill, drill press and the like .