JIANTAI 5-35mm HSS Large Cobalt Hole Titanium Cone Step Drill Bit Tools High Speed Steel Unibit Stepper Cone Drill Bit

JIANTAI COATING. Step Drill Bit for Metal Heavy Duty: Cnc machined, titanium coated, heat-treated, corrosion-resistant. Drill Bits for Stainless and Metal: Titanium, hardened steel, cement molding, polyethylene, corrosion absorbent, and corrosive. Step Drill Bit for Metal Original: Cnc machining, dring, drilling. Hole Saw for Tiles and Concrete: Cylinders for masonry, mementry. Electtic Drill Set Japan Made: High strength titanium for increased durability and long-lasting durability. No need for a pilot hole. Titanium coated to reduce friction and run cooler. Automatically deburr holes as you drill. High speed steel, durable. Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet, ect. Specification: Color: Silver. Material: High Speed Steel. Surface: Nitrogen treatment increasing the hardness and abrasion resistance). Shank: Triangle round handle. Scop: thin iron plate, aluminum, insulation panels, PVC panels 4mm thi