Titanium high-speed steel: classic high-speed steel and titanium coating with high capability and durability in drilling holes in plastic, aluminum, copper, and many other types of sheet metal. ... A drill can alter the use of more than a bit and does not need to replace the drill bit and positioning holes. Feature: Automatically deburrs holes as you drill, they also help to enlarge existing holes. The two-flute design tips made the penetration faster without chipping. Made from high-quality HSS steel with a long service time. Ideal for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. Specifications: Material: HSS Shank type : Round shank Surface treatment: Titanium Shank diameter : 13mm Total length : 71mm Bit Range : 5-35mm Step quantity : 13 (5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 32mm, 35mm) Uses: Drilling clean and precise holes in wood Cutting holes in steel and metal sheets Suitable for plastic and composite materials Ideal for DIY, workshop, and industrial tasks Used for creating holes of varying sizes without changing bits Package Includes: 1 x 5-35mm HSS Titanium Step Cone Drill Bit High-Speed Steel Wood Steel Hole Cutter