Tungsten carbide cutting teeth ensure accurate, smooth hole drilling on even challenging surfaces. Highly versatile, can be used on various metal including stainless steel, brass, copper and steel. Comprehensive package with everything you need included: Pilot bit, Arbor, Allen key and Complimentary storage case. Pressure sensitive ring ejector pushes out scrap plug out when the work piece is drilled all the way down. Matte-black corrosion-resistant coating provides daily protection. Instructions: Use sufficient lubrication to prevent over-heating for optimal efficiency and longevity of the tool. RPM during operation should be lower than 500 to prevent clogging. Tungsten Carbide Tipped Hole Saw