WORKPRO W002900A 3-Piece Spirit Level Set 12", 24" Lightweight strong box beam frame design, traditional spirit level with smooth sides 9" Handy light metal casing in an especially slim form - extremely sturdy 9" Spirit level with milled measuring surface and 4 piece strong button magnet Light metal die cast profile with milled measuring surface, 1 vertical vial, 1 horizontal vial and 45 degree vial You always have your hands free when aligning metal posts and beams