Starrett 11HC-6-4R Cast Iron Square And Center Heads With Regular Blade Combination Square， Black Wrinkle Finish， 4R Graduation， 6" Size<img src="http://ecx.images-amazon.com/images/I/41zGNZndYWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pmAl6Yi4L.jpg" noproxy>