Starrett 11MHC-300 Cast Iron Square And Center Heads With Regular Blade Combination Square， Black Wrinkle Finish， 300mm Size<img src="http://ecx.images-amazon.com/images/I/31dI-szEQwL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31OG-e0ZTjL.jpg" noproxy>