Bordo 4-30mm HSS-Co5 TiAlN Coated Spiral Flute Step Drill Set 3 Piece

4-30mm 3 Pce Spiral Flute HSS Cobalt Step Drill Set HSS-Co5 (Cobalt) Titanium Aluminium Nitride Coated (TiAlN) Spiral Flute Step Drill Set Bordo Cobalt Spiral Flute Titanium Aluminium Nitride (TiAlN) coated step drills offer unparalleled performance when drilling hard metals such as stainless steel. HSS-Co5 material provides increased performance and tool life when machining tough steels. Bordo step drills are ideal for electrical contractors, sheetmetal workers and auto mechanics. Step drills are designed for drilling repetitive holes in steel, stainless steel, copper, brass, aluminium, plastic, plexiglas, laminates and many other thin materials. High performance point for faster starting and reduced bit wander. No pilot hole required. Stepless drilling in the thinnest sheets. Burr-free drilling without sheet deformation. Automatic deburring. Spiral flutes enable easier tool penetration. Titanium Aluminium Nitride (TiAlN) is a thin film coating that was developed from Titanium Nitride. TiAlN offers higher temperature resistance than TiN, as well as slightly higher hardness and especially higher hot hardness (i.e. the hardness at high temperatures). It is primarily used in high temperature environments above the limits of TiN usage.