HanYan Angle Finder Swing Arm Protractor 0-180 Degrees Stainless Steel Ruler - 150 mm Angle Tool<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Material: stainless steel， precision digital scale ruler</li><li>Measuring length: 145mm， 0-180 degrees rotation， any measurement</li><li>Adjust the nut， you can fix the angle.</li><li>Uses: engineering， angle measurement， student drawing， architectural design， carpentry， length measurement</li><li>Work smarter， better， more productive and general</li></ul></div><img src="http://ecx.images-amazon.com/images/I/417P8soj13L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41XDPYl8a1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/414yE1js1rL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51fijnkKy9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51lVSGIniyL.jpg" noproxy>