3Pcs Step Drill Bit Set M35 Cobalt HSS 5/10/15 Step Drill Cone Bits Sturdy Hole

3Pcs Step Drill Bit Set M35 Cobalt HSS 5/10/15 Step Drill Cone Bits Sturdy Hole Drilling Bit Set Durable Tiain Nano Coating 3 Spiral Flute Step Drill Bit for Iron Aluminum Plastic
[Premium High-Speed Steel Material]Our step drill bit set is made of premium M35 cobalt-containing high-speed steel with TIAIN Nano-coating, which is very sturdy and reusable. It can process aluminum, iron and stainless steel within 5mm.
[Efficient and Durable]The step drill bit can be used for drilling, expansion hole and chamfering, more efficient and durable. And it can perform functions that twist drills cannot complete.
[Stable and Smooth Cutting]It is more stable and smoother when cutting, preventing metal debris from scattering and improving safety. The shank is not easy to slip, stronger and more durable.
[Widely Uses]The step drill bit is suitable for iron, aluminum, steel plate, 304 stainless steel, plastic, aluminum alloy, wall. Processing of glass, ceramic tiles, stone, cement and other materials is prohibited.
[Note]A hand electric drill can be used to process stainless steel with a thickness of 1mm and the power recommended is 800W or above. When processing 2-3mm thickness, please use a bench drill at a speed of 500 rpm or less.