The US PRO 3-12mm Step Drill features a titanium coating and a 1/4" hex shank, offering durability and precision for a range of materials. Ideal for both DIY projects and professional applications, this step drill is engineered for efficiency and longevity. Size Range : 3 - 12mm Shank Type : 1/4" Hex Material : High-speed steel (HSS) Coating : Titanium, reduces friction and heat Suitable For : Steel, brass, wood, plastic Brand : US PRO