Feature●This durable and versatile tool will center, spot-drill, bore and debur-all in one smooth, high performance working cycle●Drilling range in 5 steps: 7/8", 1-1/8", 1-7/32", 1-1/4", 1-3/8"●The RUKO Step Drill spiral flute is ground from the solid hardened form, a better and sharper cutting edge is achieved-without burrs●Optimized chip flow protects the cutting edges and reduces cold weld marks, cutting performance and tool life is extended significantly●With split pointDescription The RUKO step drill is the ideal tool for sheet metal working. Its suitable for all standard industrial materials: nonferrous metal, special steel, thermoplastics, duroplastics as well as sheet metal up to 1/8" thickness. The two spiral flutes guarantee quiet running and high cutting performance. The chip flow is optimized, even long, non-breaking chips will be removed easily and it protects the cutting edges. The cone makes it easier to withdraw the tool from the material.