Product Name: Senyo Carbide Drill Bits with Coolant Hole Tail-Coating Usage: metal Drilling Material: Solid Carbide Type: Coolant Drill Bit Length: Whole Length. Customized: Non-Customized Controlling Node: CNC Flute: 2 Flutes Machine Type: Miling Machine HRC: 45/55/60/65 Degree Precision: High Precision Trademark: Senyo Transport Package: 1 Piece in One Pic Box Specification: D1-25mm Over Length 50-150mm Origin: Changzhou HS Code: 8207709000 Product Description suit for mould steel, cast iron,ti alloy, copper,and aliminum processing.mainly for the processing of through hole, threeded hole and location hole of the workpiece