Step Drill Bit Set, 6Pcs HSS Titanium Step Bits with Automatic Center Punch, 50 Sizes Step Drill Bit for Metal, Wood with Aluminum Case

HSS Titanium Coating: Our high-speed steel drill bits, fortified with a titanium coating that makes the drill bit harder than a typical HSS bit, can reduce the friction drill, and perform well in heat, corrosion, and rust resistance Includes: 6-step drill (3/16" to 1/2"), 9-step drill (1/4" to 3/4"), 10-step drill (1/4" to 1-3/8"), 12-step drill (3/16" to 7/8"), 13 step drill (1/8" to 1/2"), 1 automatic center punch, marking with it before drilling can prevent drill slippage Precision-Engineered Design: The 118° split point tip drill reduces friction, pressure, and heat, making the drill bits long-lasting and efficient. The heat-treated double-edged straight flutes ensure smoother cutting and optimal chip removal Wide Application: Our step drill bit can process different diameter holes, and can be used on materials such as metal heavy-duty, iron, aluminum, brass, plastic, aluminum alloy, wood, plastic, etc. Suitable for home DIY and general use Professional After-Sales Service: The Aluminum outer box for stepped drill bit is sturdy and easier to carry and store. If you are not fully satisfied with our product for any reason, please contact us for a 100% refund or replacement

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