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

THREE SIZES: 4 mm-12 mm, 4 mm-20 mm, 4 mm-32 mm. You can choose different drill bits according to your needs. QUALITY MATERIALS: The drill bits and cone drills are made of high-quality HSS stainless steel. TIME SAVING: The HSS cone drill bit 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. WIDE APPLICATION: The drill bit can handle thin iron sheets, aluminum, insulation boards, PVC panels, wood panels, and other materials up to 3 mm thick. DELIVERY CONTENTS: 1 x Step Drill Bit Set, 1 x Storage Box