Horse collar wrench served as a wrench. For use in the metal tubing or tighten the joints with phioklom. This type of wrench, wrench's design touch page. Ate into the skin during use, so the targets are secure, so it is not suitable for the screw is used, because it will make the nut is damaged.This type of wrench, author Daniel C. Stillson by design in 1869, [1] sometimes called Stillson wrench.
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