Dart 9 Piece Premium COBALT Holesaw Kit

The Dart 9 Piece Premium Cobalt Holesaw Kit is designed for tradespeople who need to cut clean, accurate holes through materials that chew up ordinary holesaws. Cobalt-grade steel holds its edge at higher temperatures than standard bi-metal, which makes a real difference when you’re cutting through stainless steel, hardened steel plate, or cast iron. The kit covers seven common sizes: 19, 22, 29, 38, 44, 51, and 57mm, so you’ve got the range to handle most jobs without swapping kits or hunting down individual saws.

Nine pieces in total, which means alongside the saws themselves you’re getting the arbors, pilot drills, and fitments to get straight into work. That matters on site where you don’t want to discover something’s missing after you’ve already set up. The cobalt content in the tooth steel also means these saws cope better with interrupted cuts, which is the kind of thing you get when you’re cutting through box section or pipework with a wall seam in it.

Where the Dart Cobalt Holesaw Kit Earns Its Keep

This kit is well suited to plumbers, electricians, HVAC engineers, and fabricators who regularly need to cut into metal. Think back boxes in steel stud partition, cable entry holes through panel board, flue penetrations through sheet metal, or conduit knockouts in enclosures. The larger sizes in this range also handle hardwood doors for cylinder locks or letterplates, where a standard bi-metal saw would overheat and go blunt after a handful of cuts.

Size Range and Coverage

The seven sizes included cover the most common penetration diameters used across plumbing, electrical, and joinery work. From 19mm up to 57mm, you’ve got most standard cable glands, back boxes, and lock barrels covered without reaching for anything else. It’s the kind of range that gets used rather than sitting in the bottom of a bag.

At this price point, a cobalt kit makes sense as a site permanent rather than something you’re careful with. Buy two, keep one clean.