4Pcs/Set Titanium Coated Step Drill Bit Set, HSS Hex Shank Metal Multiple Hole S. - Quality Materials: Forged from titanium coated high speed steel, fully polished, drop forged and heat treated, strong and durable. Comes with 3-Piece HSS Groove Step Drill Bit (3-12/ 4-12/ 4-20mm ). HSS Hex Shank Step Drill Bit Kit are suitable for all kinds of for home DIY power drills.
- Hex shank: Most drills or drills with 6.35 mm (1/4 ") mandrel are 6.35 mm hexagon shanks, which can be firmly installed in machine tools and eliminate slippage.
- Two-channel spiral groove design: can achieve faster, more stable and smoother cutting. You can automatically chamfer holes to clean the drill.
- Easy Drilling: Two-Flute Design for smoother cutting. High Step design let you feel the stop and never drill bigger in mistake.
- Multi Purpose: This titanium coated step drill bit set is suitable for drilling of thinner stainless steel, bass,wood,plastic,carbon steel, aluminium plate, iron plate,PVC,fiberglass and other materials.Easy to carry with a nylon pouch, convenient to storage in bag, car, or at home. Perfect for professional and home use.
Features: main material high speed steel, titanium coated high quality step drill bits. A variety of diameter sizes of drilling, reaming, chamfering, deburring and drilling. Unique step structure, one drill can open various sizes of aperture, a ladder drill to a box bit. 118 degree X-shaped opening for center positioning, reducing slippage and drilling more efficient Scope of application: automotive sheet metal, repair and modification, bridge doors and windows, home appliances. Can be used for the following equipment: hand-held drilling machine, drilling machine milling machine, machining center. Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life. 3 Size: 3-12, 10 Steps (Diameter 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm) 4-12, 5 Steps (Diameter 4, 6, 8, 10, 12mm) 4-20, 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm) Package: 4Pcs straight groove step drill bits, including 3-12/4-12/4-20mm 24Sizes