STABILAs 4 foot type 196-2 K masonry spirit level tools feature extra-rigid rectangular box beam aluminum profiles with reinforcing ribs, ergonomic handles, milled measuring surfaces, dead blow shields, removable shock-absorbing end caps with anti-slip wall grips, and very accurate matched vials. These levels have been engineered for contractors that work with bricks and blocks. Through patented strike zones, any out-of-line bricks can be adjusted with trowel taps.