Lang Tools offers a wide variety of automotive wrenches. Lang Tools offers serrated bit wrenches which are used to install and remove 12-point (triple-square) metric socket-head screws. These serrated bit wrenches can be turned with a socket or a wrench. Lang Tools also offers tie rod, ford ignition module, drain plug, Ford headlight, Cadillac socket head drain plug and GM multifunctional switch tool wrenches.