Starrett C11HC-12-16R Cast Iron Square And Center Heads With Satin Chrome Blade Combination Square， Black Wrinkle Finish， 16R Graduation， 12" Size<img src="http://ecx.images-amazon.com/images/I/318h9AYE4gL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31ZQOutGjTL.jpg">