HSS Step Bits Set, Aohoo High Speed Steel Titanium Coated Cone Drill Bits Hole Cutter for Wood, Stainless Steel, Sheet Metal for DIY Plastic Wood Metal Aluminum Iron

【Hss & Titanium Coating】Step cone drill bits are made of high-speed steel, titanium nitride coating can reduce frictional heat, and the operating temperature is low, strong and durable; titanium coating ensures free cutting steel, aluminum plate, brass, copper, plastic Wood, etc. 【Hex Shank】1/4 "(6.35mm) hex shank is suitable for most drills or drills with 1/4" chuck, can be firmly installed in the power tool chuck and eliminate slippage. Step bit kits include: 4-32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm); 4-20mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm); 4-12mm (4, 6, 8, 10, 12mm); 5-35mm (5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32, 35mm). 【Step Drill Bit for Metal】High-speed steel, through heat treatment and tempering, makes the step drill bit have the function of long-term use; the step drill can easily cut multiple sizes of holes with one drill bit, without constantly changing the drill bit. 【Easy Drilling】The two-slot straight groove ladder drill design prevents slippage, quickly removes chips and deburrs the hole, the pressure is small, drilling and cutting are faster and smoother; it can achieve faster, more stable and smoother cutting The hole can be chamfered automatically to clean the drill bit. 【Long Life and Convenient Use】Suitable for home DIY and general building supervision / project use. Widely used for cutting various materials such as wood, plastic, thin iron plate, thin aluminum plate and so on. It is suitable for workpieces with hardness below 25 °, such as carbon steel, with plate thickness below 5MM.