Acoustical Tile Saw

If a drill-powered hole saw seems like overkill for cutting holes in acoustical tile for sprinkler heads, you might rather use a hand-powered saw like this one from Marshalltown.
This lightweight saw quickly and accurately cuts 2-1/2″ holes in acoustic tile — probably with less mess than a powered saw, too.
Marshalltown’s acoustical tile saw runs about $13.
Acoustical Tile Saw [Marshalltown]
Acoustical Tile Saw [ToolDogs.com]
Wonder if this would work on drywall.
It is incredible what you can achieve with a good tile saw. This has been helpful but I will keep looking to be able to compare the available machines. Thank you for posting this.
Its funny for a second there I thought the title was for a musical hole saw for use with porcelain tile 😉