Description
12 hole Reference Standard. Hole sizes: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8 and 3/4 inch diameters, .030″ x .030″ x .005″ +/-.002″ Wide Corner EDM Notches and .020″ x .020″ x .005″ +/-.002″ Wide Mid-Wall EDM Notches. Materia…