Abstract: Disclosed herein is an improved arrangement for the operation of an overhead garage door that comprises an adapter utilized for installation and periodic maintenance of the support arrangement. Also disclosed is an adapter for use with existing garage door structures, improved wrenches for use in tensioning coil springs usually found in such arrangements and a method for tensioning such coil springs when they are originally installed or during periodic maintenance of the springs. The adapter comprises a body that may be mounted upon a rotatable shaft that supports the coil springs and be non-rotatabley attached to an end of the coil spring and the rotatable shaft. The attachment to the shaft is a releasable connection and the body has splines or projecting abutment surfaces so that two of the improved wrenches according to the present invention may have their jaws closely surround and engage the splines on the body.

Abstract: A manually operable tool for inserting or removing contacts into or from electrical connectors, having an elongated handle housing with a spring-loaded longitudinally slidable member therein, the forward extremities of both the slidable member and handle housing having jaws in opposed parallel relation to each other, and operable to hold a contact under spring pressure or to release the contact when the slidable member is moved rearwardly.

Abstract: Automatic adjustable wrench wherein one jaw is adjustable by movement of a toothed surface of the jaw along a toothed support. The movable jaw is spring biased to close against an object disposed between the jaws of the wrench, and hence is automatically adjusted.