Dart 11 Piece Premium COBALT Holesaw Kit

The Dart 11 piece cobalt holesaw kit is one of those sets you buy once and stop thinking about. Cobalt-grade steel teeth handle the jobs that would chew through standard bi-metal saws in short order — stainless steel, hardened plate, cast iron flanges, the stuff that turns a normal holesaw red and useless inside a few cuts. With nine saw sizes ranging from 16mm up to 76mm, you’ve got the spread to handle back boxes, conduit entry points, pipe penetrations and structural fixings without reaching for a second kit.

The included sizes are 16, 20, 25, 32, 44, 51, 64, 68 and 76mm — a practical selection rather than a marketing exercise. That 32mm is your standard cable gland size, 68mm is your single-gang back box, and 76mm covers most plastic pipe and larger conduit entry work. Not every manufacturer gets this right, but this spread covers the calls you get day in, day out.

What the Cobalt Dart Holesaw Kit Is Actually For

Cobalt holesaws earn their place on jobs where bi-metal just won’t cut it — literally. The cobalt content increases heat resistance significantly, so the teeth stay sharp longer when cutting harder materials. That matters when you’re drilling multiple holes in a steel enclosure or working through a hardened door skin. It also means the saw is entirely at home in timber, MDF, plasterboard and plastic, so you’re not carrying two sets.

The Kit Contents

Alongside the nine holesaw cups, the Dart 11 piece cobalt holesaw kit includes two arbors and a pilot drill bit. Everything stores in a moulded carry case, which won’t fall apart when it hits the van floor — a low bar, but you’d be surprised how many cases don’t clear it. The arbors are the standard quick-release type, so swapping between saw sizes is fast when you’re working through a board full of different-sized penetrations.

Whether you’re an electrician, plumber, joiner or general builder, a cobalt holesaw set at this price point makes sense as a permanent fixture in the van rather than a one-job purchase.