IRWIN Tools Rafter Square， Aluminum， 12-Inch (1794465)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Made from proprietary steel and heat-treated to control hardness</li><li>The forged tip allows for a secure grip and maximum contact eliminating stripping</li><li>The Shockwave Impact Duty accessory line is not only ideal for heavy-duty impact applications</li><li>This professional tool has permanent deep stampings are durable. The aluminum body is rust-proof and weather-resistant.</li><li>The square has multiple scales: 1/8-， 1/10-， 1/12-， and 1/16-inch.</li><li>Can be used as a protractor， saw guide and tri and mitre square， and ruler.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41WFXW-TXkL.jpg" noproxy>