6Pcs HSS Steel Titanium Step Drill Bit Set 4-12/20/32mm Metal Hole Cutter Wood Cone Core Drilling Hole Saw Tool+3,6,8 Saw Drill

[Special Note]: HRC (high breaking capacity); Our products are divided into two hardnesses, HRC62 and HRC67. The first material is HRC62 (marked as A-B-C on the picture), drilled plastic, wood, and aluminum are all right. But if you need to drill steel or iron plates, or want a longer tool life, we recommend that you choose the second material HRC67 (D-E-F-G is indicated on the picture). [Specification]: 4 - 12mm 5 Steps (4mm,6mm,8mm,10mm,12mm) 4 - 20mm 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. Note: In the Type C and G, 4-12 is 9 Steps (4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm) [Advantages]: 1. Step drill is triangle round handle or hexagonal handle, prevent sliping. The saw and drill is a round handle. 2. "X" shaped openings, drilling is not easy to slip. Higher precision, more sharp, burr-free drilling. 3. The gold is titanium coating, more wear and oxidation resistance, not rust. 4, The unique step structure, a drill can drill a variety of sizes of the aperture. You can deburring, chamfering, punching elliptical hole. 5. The hardness of the workpiece below the use of 25 ° below, such as iron, aluminum, PVC board, insulation board, wood, workpiece thickness 4mm. 6. Suitable for installation in the pistol drill and bench drill. [Packaging]: As shown in the picture, there are ordinary plastic bags, blue cloth bags, a single white pull-out box, and a beautiful red box.