Lufkin HX46N 6' Wood Rule Red End with Hook<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Graduated slide rule extends up to 6-Inch</li><li>Slide rule runs under friction in T-slot</li><li>Stops at each end to prevents slide from falling out</li><li>Has hook; zero falls at inside of hook， for distance measuring</li><li>Marked both sides and both edges</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41c1e4cxJbL.jpg" noproxy>