Description
12 HOLE REFERENCE STANDARD, 15 Total EDM Notches. 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. Material: 4340 Steel. .030″ x .030″ x .005″ ± .001″ Corner Notch in each hole, .008″ ,.020″, .040″ x .0…