I've got an hilti dx350 nail gun for sale it's got the original carry case it's in great condition it's called powdered because it use firing caps to push the nail though concrete,steel,wood ect..... you have 3 power levels it all depends on the firing caps you use .green is mild,orange medium,and red is strong .it has alot of uses it can drive a 6inch nail straight in to 3in of concrete and 3in of steel .brand new it cost me £