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COFAN HSS Step Drill Bit 6-22.5 mm | Precision Drilling for MetalUnlock superior efficiency and precision in your drilling tasks with the COFAN HSS Step Drill Bit. Engineered for professionals and discerning DIY enthusiasts, this single tool eliminates the need for an entire set of conventional drill bits, saving you time, space, and money. Whether... moreyou are working in an electrical, plumbing, HVAC, or metal fabrication setting, this step drill is designed to deliver flawless results on every project. Its primary function is to drill clean, perfectly round holes in a variety of materials, most notably metal sheets.This high-performance accessory is designed for drilling multiple hole sizes, from 6 mm to 22.5 mm, without ever needing to change the bit. This individual tool is the ultimate solution for enlarging existing holes and drilling new ones with unparalleled accuracy. The stepped cone design allows you to progressively increase the hole diameter smoothly and with complete control, resulting in a burr-free finish that often requires no subsequent deburring.COUNTERSINK BIT HSS.Drill bit in high-speed steel ground with two flat cuts.The core benefit of the COFAN HSS Step Drill Bit lies in its exceptional versatility and robust construction. The precision-ground High-Speed Steel (HSS) ensures outstanding durability and heat resistance, allowing you to tackle demanding jobs with confidence. The specialized geometry featuring two flat cuts, or dual flutes, provides an aggressive yet stable cutting action. This design efficiently evacuates chips and debris, reducing friction and heat buildup, which extends the life of the bit and ensures a consistently smooth and rapid drilling performance. Each step is clearly marked, enabling you to stop precisely at your desired hole diameter.Ideal for drilling through sheet steel, aluminum, brass, copper, plastic, and laminates, this bit is a must-have for any toolkit. Its secure shank prevents slipping in the drill chuck, guaranteeing maximum torque transfer and operational safety, even at high speeds. Move seamlessly from one task to another, from creating pilot holes to achieving a final 22.5 mm opening, with one reliable and expertly crafted accessory.Technical Specifications:* Product Type: HSS Step Drill Bit* Drilling Range: 6 mm to 22.5 mm* Number of Steps: 12 Steps (6, 7.5, 9, 10.5, 12, 13.5, 15, 16.5, 18, 19.5, 21, 22.5 mm)* Starting Diameter: 6 mm* Material: High-Speed Steel (HSS), Ground* Design: Dual-flute for efficient chip removal* Application: Primarily for Metal drilling, also suitable for plastics and wood* Shank: Engineered for a non-slip grip in standard drill chucks