Thanks for your reply.
Perhaps I sould have been a bit more specific, appologies.
One of our largest selling products in the UK is a device which drills a square, flat backed hole in masonry materials for the installation of outlet boxes. The operation takes approx. 1-3 mins depending on material.
I am trying to asses the suitability of this product in the USA.
If you feel this is something you could benefit from I would be grateful to hear your opinions.
Cheers
Dale