Want to find the exact center of a work piece that may not be square? Straight across may be an odd number like 47⁄32 inch that is cumbersome to determine the exact mid-point. A machinist showed us a much simpler technique. Lay the straight edge at an angle with the length set to a round number, like 8 inches. Halfway is 4 inches—mark that point. Move to the other end of the work piece and establish an angle with say 10 inches across and mark the center at 5 inches. Those two marks now position the exact center of the piece. Simple, yes?