6pcs Step Drill Bit Set with Punch High Speed Steel Drill Bits Set Stepped Drilling Tool
Description
1、Can be used for deburring chamfering opening and reaming functions that can not be completed by twists drill. 2、Straight grooves structure and triangular shank can open a variety of sizes. 3、Open a beautiful aperture clear scale small vibration than ordinary twists drill. 4、Suitable for the workpiece with hardness below 25℃ such as iron plate aluminum plate PV plate insulation board. 5、Including 5pcs drill bit of the package meeting your different needs.
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