(opp bag) 6Pcs HSS Titanium 4-12/20/32mm Step Drill Bit Set +3/6/8 Saw Drill Hole Cutter

Advantages: 1、 X shaped openings drilling is not easy to slip. Higher precision more sharp burr-free drilling. 2、The unique step structure a drill can drill a variety of sizes of the aperture. You can deburring chamfering punching elliptical hole. 3、Suitable for installation in the pistol drill and bench drill. 4、The hardness of the workpiece below the use of 25 ° below such as iron aluminum PVC board insulation board wood workpiece thickness 4mm. Specifications: [Material]: High-speed steel 4241 [Handle]: Step drill is triangle round handle prevent slipping. The saw drill is round handle. [Surface Treatment]: The gold is titanium coating more wear and oxidation resistance not rust. [Size]: 4 - 12 mm 5 Steps (4mm 6mm 8mm 10mm 12mm) 4 - 20 mm 9 Steps (4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm) 4 - 32 mm 15 Steps (4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm 24mm 26mm 28mm 30mm 32mm) Saw drill: 3mm 6mm 8mm. Package included : 1 X 4mm-12mm Grooved Drill Bit 1 X 4mm-20mm Grooved Drill Bit 1 X 4mm-32mm Grooved Drill Bit 1 X 3mm Saw Drill 1 X 6mmSaw Drill 1 X 8mmSaw Drill