ZVD 3-piece step drill bit - hss stainless steel, 4-12/20/32mm, titanium triangular taper, with hex shank, for screwdriver drilling on steel, brass,

This drill bit is the new HSS steel large step cone drill bit set, which is made of high-quality HSS steel and coated with titanium to reduce friction and heat. It is very suitable for drilling holes in a variety of materials, including steel, brass, wood, plastic, etc. Made of M42 high-speed steel with a titanium coating to reduce friction and heat. No pilot holes or pre-drilling required. Automatically deburrs holes as you drill. Ideal for thin metals, steel, aluminum, copper, brass, fiberglass, PVC, etc.