Features: _x000D_ Can be applicable to iron, steel, copper, aluminum and other processing. _x000D_ Each bit has a double end and grinding at a standard 60 degree Angle. _x000D_ _x000D_ Sharp and durable, accurate positioning, cutting edge clear. _x000D_ Quick cutting speed, and good chip removal. _x000D_ For precise center drilling in metals. _x000D_ When rotating between the tips, the two end faces of the workpiece receive the corresponding centering bore. _x000D_ Preparation tool to maintain the exact drilling position. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Quantity: 6 PCS _x000D_ Product specification: 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 5mm _x000D_ Specific dimensions: as the picture _x000D_ Weight: 60g _x000D_ No._x000D_ Body diameter_x000D_ Drill tip diameter_x000D_ _x000D_ #1_x000D_ 4mm_x000D_ 1mm_x000D_ _x000D_ #2 4mm 1.5mm_x000D_ _x000D_ #3_x000D_ 5mm_x000D_ 2mm_x000D_ _x000D_ #4 6mm 2.5mm _x000D_ #5_x000D_ 8mm_x000D_ 3mm_x000D_ _x000D_ #6_x000D_ 12mm_x000D_ 5mm_x000D_ _x000D_ _x000D_ Usage: _x000D_ 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, _x000D_ designed to prevent the twist drill from walking. _x000D_ 2. Used for work pieces with require machining between centers or producing center in components. _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 6 x Center Drill Bits _x000D_ _x000D_ _x000D_ Note: _x000D_ Due to manual measurement, may exist 1-3mm error, please understand, thank you! 1Can be applicable to iron, steel, copper, aluminum and other processing 2Each bit has a double end and grinding at a standard 60 degree Angle 3Sharp and durable, accurate positioning, cutting edge clear 4Quick cutting speed, and good chip removal 5For precise center drilling in metals