CNC Bridgeport Setup Plate is constructed from 1018 steel that is 12" x 9" x 1".  With a 1" spacing are a grid of 1/2-13 tapped holes and a grid of 1/4 dowel holes.  Parts can easily be located one after the next by nesting the parts into a corner with the dowel pins and clamping with the tapped holes.  Parts can be machined completely around the perimeter by clamping in the center.  This is an invaluable tool for the diemaker to have in his tool box.  Best of all made in USA by Americans for Americans. Flatness ±.001, hole center ±.0005, hole size ±.0005. For other nice products please visit my web page.