Thing is a beast. Blasted the OSB subfloor and concrete slab like they were nothing. I also chewed on my thick ceramic tile quite a bit, but decided to save it for the future and finish the job with a chisel. Although sparks fly from the surface of the tile for about 30 seconds, the teeth are still sharp. I'm sure he'll make Cinder Blocks and Bricks more than once, maybe a lot more. I'm assuming the mandrills are a standard size because they fit my Dewalt mandrill perfectly, so thanks for not needing a signature mandrill!