I have tried to track down a 5" hole saw to make cutouts for 120mm fans. The closest that I have been able to find is a 4.5" hole saw. Is this what you guys use? Would that work? I have found this ...

Diablo’s Demo Demon Carbide Teeth Rough-in Hole Saw range is available in various sizes from 1-3/8 to 4-5/8 in. and one, eight-piece set.

Hole saws come in a wide range of diameters, too, so whether you’re cutting a ¾-inch hole for conduit or a six-inch hole for can lights, you can find one that suits your needs. Best Hole Saws ...

2 1/8-in. Bi-Metal Arbored Hole Saw. If you’re primarily using your hole saw to create holes for door locks or knobs, and don’t need the variety of a large kit, this Lenox Tools model is a ...