These center-finding rules are the easiest to read of any on the market.
Available in 12" and 24" lengths, the rules have a dual scale: normal graduations on the top edge and half-scale graduations on the opposite edge. To find the center, just find the identical measurement from the top scale on the lower scale. For example, to divide 19-3/8" in half, simply read 19-3/8" from the lower scale (on the 24" rule). Nothing could be easier.
Made from stainless steel with a matte finish. The graduations (16ths) are etched and black-filled for readability.
These are extremely useful rules for marking and layout.