Denuotop – Grooved Step Drill Bit [10 to 45 mm] – high speed steel, triangular shank, hss diy drilling tools.

Description

[Stepper Drill Size]: 10mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm.A variety of drill bits can meet your different requirements and save time and money. Li> [Premium Materials]: These step drills are made of heat-treated 4241 high speed steel (HSS) and are coated with titanium nitride. Titanium coating can reduce friction and operating temperature, which can effectively extend service life. Li> [Step structure]: The drill bit can drill holes with different specifications without having to buy multiple drills, saving space and money. Li> [Double groove]: Automatic deburring during drilling. Cutting is faster and smoother. Three flat handles ensure a firm grip. Triangular round shank: Can be easily installed into an electric screwdriver, drill bit and pressure drill. Li> [Applicable]: The step drill kit can be used for parts with a hardness of less than 25� and a thickness of less than 5 mm. Suitable for various materials such as carbon steel, iron sheet, insulation board, PVC