Step Drill ST-1 – Multi-Size Hole Cutter 4–12 mm

The Step Drill ST-1 is a versatile multi-size hole cutter designed for marine and industrial applications. Made from heat-treated alloy steel, this step drill allows you to create holes from 4 mm to 12 mm in a single pass, eliminating the need for multiple drill bits. Its stepped conical design enables precise, burr-free holes in steel, stainless steel, plastic, and wood, making it an essential tool for ship chandlers, shipyards, and workshops.

Each step is clearly marked with the corresponding diameter for quick and accurate sizing. The drill's heat-treated surface provides high hardness and wear resistance, ensuring long-lasting sharpness and efficient chip evacuation. Whether you're installing electrical panels, working on piping systems, or performing general maintenance, the ST-1 step drill delivers reliable performance and increased productivity.