Check the listing for details. Step Drill Bit - Titanium Coated, Double Cutting Blades, HSS, Short, 10 Sizes. Color: Gold, Condition: New. Listed at 9.95 USD. HSS Titanium Coating - High speed steel along with titanium coating ensures outstanding durability and sharpness, can reduces the friction, runs cooler.Meet Your Demands - With the step drill bits we offered, you can process different kinds of diameter holes, which greatly saves you a lot of trouble. Great for steel sheets/ aluminum sheets/ copper/ plastic/ wood board and many other types of sheet metal with ease countersunk. Suitable for Home DIY, and General Building/ Engineering Use.Design - The split point tip is at 118 degrees to increase the wear resistance. The two flute design provides a smoother cutting, allows the material particles escape easily for a much more clean drilling operation.Safety and Stability- The 3 flat shank is better clamped on the pistol drill to prevent slippage and shedding during the rotation.Size Includes - One drill with 10 steps: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" can fit the majority of brands currently on the market.