PacTool International SA903 2-Piece Gecko Gauge Hardi Board Siding Gauges<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Gauges and supports siding for one-person installation.</li><li>Friction-Cam mechanism supports full 12' cement-board siding lengths.</li><li>Adjustable at 1/4" increments for 4"-8" siding reveals.</li><li>For use with 5/16" fiber-cement siding products. Heavy-gauge plastic helps avoid marring the painted surface.</li><li>Currently this tool is Zone 10 specific</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31m8jIJOBoL.jpg" noproxy>