55/64" HSS 3MT Taper Shank Drill Bit Designed to perform in a broad range of materials in the iron and steel families. They have a black oxide surface treatement that is abrasion resistant, reduces chip welding and improves chip flow.
Round Dies are chamfered on both faces. Adjustment is obtained by a fine pitch screw which forces the sides of the die apart, or allows them to spring together. #5-40 1" OD HSS Round Adjustable Die The slot is beveled so that when the dies are used in a machine holder the adjusting screw can be removed and adjustment made by the adjusting screws in the holder.