Level Plumb Square Length 50cmLevel Plumb Square Length 50cm size 52x12xh6. Will Angles stops at 045 90 135 180 all on one level. The design allows the level to be folded in half for convenient storing. 45 position for laying out diagonal floors. 90 position for setting square on floors or to check the plumb. 180 position to check the level and to take measurements. A very handy all purpose square.