10 Sizes Step Drill Bit for Metal Sheet, 1/4 to 1-3/8 Inches High Speed Steel Drill Cone Bits for Hole Drilling Cutting, HSS Multi Size Hole Stepped Up Unibit

HSS Titanium Coating - High speed steel along with titanium coating ensures outstanding durability and sharpness, can reduces the friction, runs cooler.
Size Includes - 10 Sizes from 1/4 to 1-3/8 inch can fit the majority of brands currently on the market.