just used these bad boys to remove sand /cement mortar from flagstones on a job im doing,dunno if many of you guys have used them but they were excellent.the only thing was i ran out lol used 2 in 4 hours and plodded of to bee and spew for a new one,,,exactly the same one was 21.50 compared to a fiver at trade tiler.ill be buyin them in bulk next time tt,cheers top bit of gear