（宝塔钻）Step Drill Bit High Speed Steel HSS Cone Drill Bit Hex Shank Titanium Coated Hole Cutter 3-12mm 4-20mm 4-32mm

【 HIGH-SPEED STEEL】The step drill bit is made from high-speed steel which has high hardness and good wear resistance.

【WIDE SIZE RANGE】This step drill bit can be used for drilling a wide range of hole sizes from 4mm to 22mm, and 4mm to 32mm, can be widely applied.

【TITANIUM COATED 】The surface is coated with titanium which has better anti-rust performance and will not fade easily.

【SIZE CLEARLY MARKED】The hole sizes are clearly marked on the surface, you can check the data easily.

【WIDE APPLICATION】Step drill is most commonly used on softer materials such as thin iron sheets, aluminum, PVC, and wood board of 5mm or thinner. Great for use in work where thin steel, aluminum, or plastic boxes and chassis are encountered.