Step Drill Bit Set, Spiral Grooved, High Speed Titanium Coated Steel, 4mm to 12/20/32mm Metric Hex Shank, HSS Cutting Tool for DIY Plastic, Wood, Metal, Aluminum, Copper

【Convenience】 Step drilling allows you to cut multiple holes with one drill bit, without constantly changing bits. 【Two-Flute Spiral Groove Design】 Enables faster, more stable, and smoother cutting. It can automatically chamfer the hole to clean the drill bit. 【HSS and Titanium Coated】 Made of super-strong HSS steel and titanium coated, the titanium coating ensures easy cutting of steel, aluminum sheet, brass, copper, plastic, wood, etc. 【Hex Shank】 The 6.35mm hex shank works with most drill bits or drills with a 6.35mm (1/4") chuck, fits perfectly with power tools, and eliminates slippage. 【Application】 Suitable for sheet metal, sinks, car repair, etc. Widely used for cutting holes in a variety of materials such as plate, aluminum, insulation board, PVC board, and wood up to 5mm thick. Caution: Please cool with water while working due to the high temperature to extend its lifespan. The recommended speed is 250-400 RPM/min. The single-stage design allows one drill bit to open holes of various sizes, equivalent to a drill set. High-speed steel tools are good for most general applications, offering a combination of hardness and toughness. Wear resistance - Multifunctional, a great tool for deburring, chamfering, and enlarging holes - Stable, no pre-work required. - Packed in a nylon bag for good protection. Use: Appliquéd in gun drilling, bench drills. Material: HSS steel. Finish: Titanium. Type: Step Drill Bit. Head Type: Hexagon Shank. Quantity: 3 pieces. Material: High-speed steel. Surface treatment: Titanium coated. Color: As shown in the picture.