Multiply drilling diameters with a single tool using our range of stepped cone drill bits. Designed to drill and enlarge holes in sheet metal, steel, aluminum, or plastics, they allow smooth progression without changing tools. Each step is engraved for easy identification and clean finishing. Ideal for electrical work, ventilation, or bodywork, this versatile bit ensures time savings, precision, and comfort of use. An essential for series drilling and multi-diameter applications.