Sealey 3 Piece Spiral Fluted HSS Step Drill Bit Set

The Sealey 3 Piece Spiral Fluted HSS Step Drill Bit Set is a professional drill bit set designed for precise stepped hole drilling across a wide range of diameters. This versatile set includes three high-speed steel step drills manufactured from HSS 4341 material, delivering reliable performance in sheet materials and thin metals commonly encountered in electrical, HVAC, and general fabrication work. The double spiral flute design is engineered for efficient swarf clearance, preventing clogging during operation and maintaining clean, accurate holes throughout the drilling process. This configuration ensures smooth chip evacuation even when working with softer metals like aluminium or thin gauge steel. Together, the three bits provide up to 18 different hole sizes ranging from 4mm through to 30mm, offering exceptional versatility from a compact three-piece set. Ideal for electricians drilling conduit entry points, plumbers creating pipe penetrations, or fabricators requiring multiple di