STABILAs 6 foot type 196 M spirit levels feature extra-rigid rectangular box beam aluminum profiles with reinforcing ribs, recessed rare earth magnets, milled measuring surfaces, removable shock-absorbing end caps with anti-slip wall grips, ergonomic handles, and very accurate matched vials that ensure both plumb readings are the same when leveling in normal or reverse positions. These hand tools are the most popular STABILA box frame spirit level tools in North America!