Sealey Double Fluted HSS Step Drill Bit 4mm - 30mm

About this tool

The 4mm - 30mm variant of the Sealey Double Fluted HSS Step Drill Bit extends your drilling capabilities into larger diameter holes, making it indispensable for HVAC installations, heavy-duty fabrication, and industrial maintenance work. Progressing in 2mm increments from 4mm up to 30mm, this step drill eliminates the need for an entire set of conventional drill bits. Manufactured from high-speed HSS 4341 steel, this robust tool maintains its cutting edge even when drilling through demanding materials. The double straight flute configuration provides superior swarf clearance, ensuring clean, precise holes without the frustration of material build-up. The extended 30mm maximum diameter opens up possibilities for larger cable glands, pipe penetrations, and mounting applications. This versatile tool arrives in a protective plastic storage case, keeping it secure during transport and readily accessible when needed. The comprehensive size range from small pilot holes to substantial 30mm openings makes this the go-to choice for professionals requiring maximum flexibility. Features and Benefits: • Extended 4-30mm range for larger applications • 2mm increments throughout entire range • High-speed HSS 4341 steel for longevity • Double straight flutes ensure clog-free operation • Protective storage case included Specifications: Brand: Sealey Nett Weight: 0.14kg Size Coverage: #3; 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm

Retailer description · Tooled Up · Observed 12 Oct 2026. Check the retailer’s listing for full specifications and contents.