The countersink drill bit set total 3 different diameter sizes, 12mm(1/2''), 16mm(5/8''), 19mm(3/4'') with 1/4 inch hex shank.
Made of industrial grade high carbon steel, more durable, non deformation, long service life.Heat treatment, high frequency quenching, enhance the hardness.
1/4 inch hex shank drill bit is fit for quick replacement, generally used in most power tools.
5 Flute design with staggered cutting teeth arranged to ensure free chip flow and quick free cutting.
Perfect for wood openings, reams, chamfer, screw heads, etc; Suitable for soft metal, wood, rubber, plastic. Please do not use these chamfers on the high hardness metal material!
