3PCS Metal Step Drill Bit Set, 4-12/20/32mm Metal Step Milling Cutter, Triangular Conical Titanium HSS, Hex Shank for Steel, Wood, Brass, Aluminum, PVC, Center Punch and Torsion Drill Bit Included

【MULTI-SIZE】: 1 pc 15-step drill bit (4-32mm), 1 pc 9-step drill bit (4-20mm), 1 pc 13-step drill bit (4-12mm). Three sizes are available to meet your needs. The package includes a nylon bag. 【QUALITY MATERIALS】: Classic high-speed steel with a titanium coating on the surface, offering proven performance and durability for drilling holes in plastics, wood, aluminum, copper, stainless steel, and many other types of sheet metal. Titanium alloy drill bits are especially suitable for processing copper and aluminum parts, die steel, spring steel, cast iron, iron, and other metal materials. 【PRECISE POSITIONING DRILL BIT】: When pressed against the surface, it generates an automatic, high-impact, spring-loaded striking force, and an adjustable cap allows you to regulate the striking force. The knurled surface of the brass body is highly slip-resistant, providing precise positioning points without worrying about deviations. 【EASY DRILLING】: The twin-blade design offers faster, smoother drilling at low pressure and high steps, so you won't feel any stagnation or resistance, with optimal speed and accuracy. 【LASER ENGRAVING】: The size is laser-engraved into the metal, so it won't wear off even with repeated use, making precise drilling easier. WHAT YOU GET 1 x Nylon Bag 1 x HSS Step Drill Bit 4-12 mm 1 x HSS Step Drill Bit 4-20 mm 1 x HSS Step Drill Bit 4-32 mm mm 1 x automatic center punch 1 x twist drill bit