3PCS Metal Step Drill Bit Set, 4-12/20/32mm Titanium HSS Conical Triangle Cutter, 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, titanium coating on the surface, 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 particularly suitable for machining copper and aluminum parts / die steel / spring steel / cast iron parts / iron and other metallic materials. 【PRECISION POSITIONING DRILL BIT】: When pressed against the surface, it produces an automatic, high-impact, spring-loaded striking force, and an adjustable cap allows for precise control of the impact force. The knurled surface of the brass body provides excellent grip. offering precise positioning points without worrying about deviations. 【EASY DRILLING】: The twin-blade design provides faster, smoother drilling at low pressure and high steps, so you won't experience 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. Note: All data is measured manually. Please allow for a 1-3 cm error due to differences in lighting and display. There may be slight color variations; please refer to the actual item received.