Step Drill Bit 4-30mm HSS Cobalt Cone Hole Cutter Metal

A step drill bit for drilling multiple hole sizes in thin metal without changing between standard bits. Made from HSS with a 5% cobalt alloy, it is suited to repeated drilling where a clean, controlled hole is needed.

Used for garage work, workshop jobs, fabrication, vehicle maintenance and general metal repair, this cone hole cutter helps when you need to open out holes across common sizes. It is handy for sheet metal, panels and other thin materials up to 4mm thick, making it useful for fitting components, running cables, mounting fixings or tidying up existing openings during repair work.

The stepped design covers sizes from 4mm up to 30mm, so one bit can handle a wide spread of common drilling tasks. The HSS cobalt construction is intended to improve cutting ability and longevity, which is helpful for regular use on thin metal. For anyone doing maintenance or repair work, the broad size range also helps avoid switching between separate drill bits for every hole size. That makes it easier to keep jobs moving, especially when working through several fittings or adjustments in one go.

HSS step drill bit specifications

• Size range: Steps from 4mm to 30mm for covering a wide selection of common hole sizes.
• Material: HSS with 5% cobalt alloy for cutting ability and longer service life.
• Application: Suitable for cutting holes in materials up to 4mm thick.
• Design: Cone step pattern allows progressive hole enlargement in thin metal.
• Use: Handy for workshop fabrication, vehicle repairs, panel work and general maintenance tasks.

A practical metal drill bit for regular drilling, repair and fitting work.