Also great for leveling floors I set mine up.on the floor and get a long rat bit holder in my drill and making tape it then put a line at the level point then drive screws into the floor to give hight pegs to pour the slc ...A lazer pays for itself very quickly with the amount of time it saves. I also take it when pricing floors, it takes seconds to check how flat a floor is and whether I need to use slc or allow for an extra couple of bags of adhesive
I hope that makes sense ?