IRWIN Tools Drywall Square， Aluminum， 54-Inch (1794477)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Thermally bonded graduations with an anodized finish.</li><li>Aluminum body is durable， rust-proof， and lightweight.</li><li>This square is used for measuring and marking sheets of drywall， plywood and other building materials.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21CyDjM1jeL.jpg" noproxy>