Abstract: A tool kit for use in combination with standard socket, open-end and box-end wrenches to provide a number of special obstruction by-pass tools whereby the wrenches may be releasably and fixedly disposed at any relative angle continuously between 0.degree. and 180.degree. with respect to one another. The tool kit comprises specially constructed elements, including one or more flex adapters and one or more bar extenders. Each flex adapter has a head and a base pivotally connected by means of a special clevis joint having cooperative means on the clevis tongue and the clevis pin for releasably engaging and securing the clevis tongue to the inside of one arm of the clevis yoke at any relative angle of alignment continuously through a total included angle of 180.degree.. The head is adapted to receive a standard socket extender. The base is adapted to removably support a conventional wrench handle or a bar extender. The bar extender is preferably an elongated handle secured to a male socket member.