Wide Opening Adjustable Miners Wrench which the first of the Rastall Tool fleet has been sold respectively in the industry since 1976. The special wide opening and is the largest available in its class in a 12” adjustable wrench. The 7/8” box end portion of the RS-12 Wrench is used for pulling drill steel and accommodates nuts on 1”-3” Victaulic couplings. For use in various trades including, but not limited to, mining, forestry, automotive and construction. Meets all of the U.S. and Canadian specifications making it the top of its class.