The fastest and easiest way to cut accurate holes for installation of inspection plugs is with powered hole saws – and IPS supplies the best.
Size: 3.5″
Requires mandrel.
These are heavy-duty industrial saws to make your job faster and easier. The mandrel separates from the cutting cup so you don’t have to throw out the whole thing when the edge wears out; simply thread on a new cup and you’re back in business.