3PCS Step Drill Bit Set, HSS Stainless Steel, 4-12/20/32mm, Titanium Conical Triangle, with Hex Shank, for Drilling on Steel, Brass, Wood, and Plastic

High-quality materials, quality assurance: The drill bits and cone drills are made of high-quality HSS stainless steel, ensuring durability. Operating suggestion: When using the electric drill, it should be as vertical as possible, without shaking or tilting, and the electric drill should not rotate too fast.

Saving time and labor, efficient and fast: The HSS cone drill is made of high-speed steel, which reduces heat and friction, cools quickly, and automatically removes debris from the hole during drilling.

The spiral design prevents slippage, making drilling easier and more efficient. Three sizes to meet your needs: 4mm-12mm, 4mm-20mm, 4mm-32mm. You can choose different drill bits according to your requirements. A wide range of uses: The product can process thin iron sheets, aluminum, insulation panels, PVC panels, wood panels, and other materials up to 3mm thick. The nylon fabric bag is convenient to carry: The product comes with a nylon fabric bag, which provides good storage and protection. There's no need to worry about loss or wear and tear caused by this small product.