General description The CCYKXA 3PCS Metal Step Drill Bit set includes three versatile drill bits designed for various materials such as steel, wood, brass, aluminum, and PVC. This set features a 15-step drill bit (4-32mm), a 9-step drill bit (4-20mm), and a 13-step drill bit (4-12mm), making it suitable for a wide range of drilling tasks. The package also includes a nylon bag for convenient storage. Technical specifications Material: High-speed steel with titanium coating Sizes: 4-12mm, 4-20mm, 4-32mm Usage Ideal for drilling holes in plastics, wood, aluminum, copper, stainless steel, and various types of sheet metal. Features a dual-blade design for faster and smoother drilling with reduced resistance. Laser-engraved sizes for easy identification and durability.