BRhino Rulers 55110 Brick Spacing Ruler ReviewbP PP Rhino Rulers 55110 Brick Spacing Ruler PWill not warp or peel in wet weatherPWashable - dirt, mud, concrete, etcPLifespan is 3 times that of wooden rulersPBack side of ruler is used for laying standard size bricks - marks show coursesPExcellent for any outdoor wet useP