Holesaw Arbors

A holesaw arbor is one of those things you only think about when you haven’t got one. It’s the bit in the middle — the mandrel that drives the holesaw and holds the pilot drill in place while you’re cutting. Without the right arbor for the job, nothing spins correctly, nothing cuts cleanly, and you end up with a wobbly hole and a bad mood. These arbors cover the full working range across two sizes: the A1 fits holesaws from 14mm to 30mm, and the A2 takes care of 32mm up to 152mm, which gets you well into the large-format cutting territory used on cable entry points, soil pipe runs, and recessed downlight installations.

Both are standard shank arbors designed to chuck straight into a corded drill or cordless driver. The pilot drill sits through the centre and extends beyond the holesaw teeth, giving you a clean pilot hole to locate the cut before the main saw bites in. This keeps the saw from wandering on the surface, which matters particularly on tiles, plasterboard, and timber where a skating holesaw causes damage fast.

Holesaw Arbor Sizes and What They Cover

The A1 is your go-to for anything in the 14mm to 30mm bracket — think cable entry grommets, small conduit knockouts, and similar compact apertures. The A2 is the workhorse for 32mm right through to 152mm. That upper end of the range is what you need when you’re cutting for soil pipes, large soil stack connections, or running 100mm extract duct through a stud wall. Most tradespeople end up keeping both on the van, partly because losing an arbor mid-job is practically a rite of passage in this trade.

At this price, picking up a spare holesaw arbor while you’re ordering makes obvious sense. They get lost, left behind, or borrowed and not returned — having a backup costs less than a large coffee and saves considerably more grief.