Steel Rules made by Product Engineering Corporation (PEC) made in the US are the industrial standard for precision and durability. Made from a high-quality chrome-plated carbon steel offers which offers superior wear resistance and long-lasting, crisp graduations. Fully hardened, tempered and etched with precision. Flexible rules are 1/2" wide and 0.015" thick. Rigid rules are 3/4" wide and 0.040" thick. See Chris' Tips "How to Use a Steel Rule" for more information on graduations.
