Features Standard 60 Degree Angle Grinding: Each bit of the HSS center drill set has a double end and grinds at a standard 60 degree angle for fast cutting and good chip evacuation. Accurate Positioning: The center drill set has the characteristics of sharpness and durability, accurate positioning, and clear cutting edge, which can effectively promote our work and is very useful. For Center Drilling: Set of 6 center drills When rotated between the tips, both end faces of the workpiece receive corresponding centering holes for precise center drilling in metals. Very Applicable: The composite center drill is very suitable for processing iron, steel, copper, aluminum and other materials, and is a very practical set of processing auxiliary accessories. Excellent Workmanship: With excellent workmanship and use of selected HSS materials, the lathe mill center drill set is strong and durable for a long service life. Features: 1.Can be applicable to iron, steel, copper, aluminum and other processing. 2.Each bit has a double end and grinding at a standard 60 degree Angle.  3.Sharp and durable, accurate positioning, cutting edge clear. 4.Quick cutting speed, and good chip removal. 5.For precise center drilling in metals. 3.When rotating between the tips, the two end faces of the workpiece receive the corresponding centering bore. 7.Preparation tool to maintain the exact drilling position. Specifications: Quantity: 6 PCS Product specification: 1.0mm, 1.5mm,  2mm, 2.5mm, 3mm, 5mm Specific dimensions: as the picture Weight: 60g Usage: 1. Center and spotting drills are traditionally used to make a conical hole for a lathe center in order to make a starting point for a standard twist drill,designed to prevent the twist drill from walking. 2. Used for work pieces with require machining between centers or producing center  in components. Package Included: 6 x Center Drill Bits Note: Due to manual measurement, may exist 1-3mm error, please understand, thank you! Package List