Lufkin 636 6 Brick Masons Wood Folding Rule<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>636 Rule is designed for use in bricklaying and mason's work with a brick mason's scale on the inside.</li><li>Graduated vertical inches to 1/16ths both edges and red course counters numbered consecutively.</li><li>Regular outside markings in black.</li><li>Clear abrasive-resistant coating protects markings.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/418KVMF5Z3L.jpg" noproxy>