Starrett 453MC Millimeter Reading Diemakers' Square With Metric Standard， Narrow Blades， 50mm Size<img src="http://ecx.images-amazon.com/images/I/41g0Yn54D1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41oNrAA0o4L.jpg" noproxy>