"I used this well made bob to strike out chalk lines to dot and dab plasterboard perfecttly vertical and level. Not easy to do single handed but luckily I had also previously bought a plasterboard prop from Screwfix and the two products together mean you can do the job on your own. The plasterboard went up as near perfect as you could wish and at far less cost than buying a laser. Plus I am not too sure you could get the laser kit as close to the wall as this bob - you'd have to ask someone who has used both products. All I do know for certain is that you can buy the prop and the bob for a tiny fraction of the price of a laser and you don't need to fork out for batteries! Old tech but solid and super reliable. Oh, and the string is not that difficult to thread, Just cut the string cleanly with a sharp scissors, wet iit, and twiist it into the hole in the bob."