Step Drill Bit Set 3mm-30mm HSS Metal Hole Cone Cutter 3pc

A 3-piece step drill bit set for drilling a range of hole sizes in sheet metal and thin materials using three HSS cone cutters. The stepped design lets you open holes progressively from 3mm up to 30mm without changing between multiple standard drill bits for each size.

Used for panel work, garage jobs, workshop use and general DIY repairs, these step drill bits are handy when fitting cable glands, switches, grommets, fixings and other components into metal sheets or thin panels. They suit vehicle maintenance, fabrication work and regular bench drilling where a clean, controlled hole is needed across several common sizes.

The set includes three taper drill bits covering 3-14mm, 8-20mm and 16-30mm, giving overlap through the middle sizes and wider coverage overall. HSS construction makes them suitable for repeated drilling tasks, while the cone shape helps with gradual cutting and size control as you work up each step. For anyone doing regular sheet metal work, the size spread helps cover common hole sizes without a box full of separate bits, which is useful for keeping jobs moving and tools organised.

Step drill bit set specifications

• Contents: 3-piece HSS cone cutter and taper drill bit set.
• Size range: Covers holes from 3mm up to 30mm across the set.
• Covers: Individual bit ranges are 3-14mm, 8-20mm and 16-30mm.
• Material: Made from HSS for regular metal drilling work.
• Application: Suitable for sheet metal, panels and other thin materials where stepped hole sizes are needed.

A practical choice for regular maintenance, panel work and workshop drilling jobs.