General description The Sollbry HSS Step Drill Bit is a versatile tool designed for drilling holes in various materials including plastic, wood, aluminum, copper, stainless steel, and other types of sheet metal. Made from high-quality HSS steel and coated with titanium, this drill bit reduces friction and heat, ensuring durability and performance. Technical specifications Material: High-speed steel (HSS) with titanium coating Dimensions: Height 74mm Handle Diameter: 7mm Drilling Range: 5mm to 35mm Usage Ideal for drilling holes in wood, sheet metal, steel, and other surfaces Self-centering tip and precise cutting edges allow for accurate drilling without running Straight chip flutes provide optimal chip ejection for efficient operation