3Pcs Blue Plating Pagode Shape Hole Cutter Hex Shank Stepped Drill Bit Cut Tool

1、Unique step structure, one drill can open a variety of sizes, and one step drills can be a box of drill bits.2、No need to use center punch, it is not easy to break compared with ordinary twisted drill.3、It is possible to complete the work which deburr, chamfer, open hole expansion, and twisted drills cannot complete4、Compared with the ordinary twisted drill, the sway is small.5、Can be used with pistol drills and table drills.Features:1. Unique step structure, one drill can open a variety of sizes, and one step drills can be a box of drill bits.2. No need to use center punch, it is not easy to break compared with ordinary twisted drill.3. It is possible to complete the work which deburr, chamfer, open hole expansion, and twisted drills cannot complete4. Compared with the ordinary twisted drill, the sway is small.5. Can be used with pistol drills and table drills.Specification:Condition: 100% Brand NewStandard: 4-20mm (4,6,8,10,12,14,16,18,20mm)4-12mm (4,6,8,10,12mm)3-12mm (3,4,5, 6,7,8,9,10,11,12mm)Package List:3Pcs Hex Shank Stepped DrillNote:Water injection while working, it can effectively extend the service life of the drill bit. The recommended drilling speed is 250-400 rpm.