Rhino Rulers 55125 Engineers 10th Spacing Ruler<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Will not warp or peel in wet weather</li><li>Washable - dirt， mud， concrete， etc</li><li>Lifespan is 3 times that of wooden rulers</li><li>Back side of ruler is used for establishing elevations for roads， sidewalks， curbs， etc. in concrete work， surverying and excavation</li><li>Excellent for any outdoor / wet use</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ZV7FCN2GL.jpg" noproxy>