C
Concrete guy
Not used ATS yet but find Marcrist 750's hard to beat for performance/longevity/value. And you dont have to faff about with water either.
We do dry cutting bits also for those that want them.
We sell a lot of these to the granite trade, where cutting a tap hole dry means not having to wait 24 hrs for everything to dry up after a wet cut.
See this thread on here.
http://www.tilersforums.com/tiling-tools/64717-dry-diamond-holesaws-vacuum-brazed-m14.html