Abstract: The present invention provides an ergonomical handle for a power tool that reduces the risk of injury to an operator's wrist or forearm by redirecting torsional forces to the operator's upper arm and reducing the force provided by the tool operator necessary to resist the torque produced by the tool. The handle includes a concave channel and a means for attaching the handle to a tool adjacent to the barrel of the tool, such as an annular collar with a substantially elliptical outer diameter. In a preferred embodiment, the channel includes an inner side wall and an outer side wall that are curved in a nonparallel fashion so as to mirror the planar and dorsal sides of a hand. In use, a tool operator inserts a hand into the channel. The side walls of the channel frictionally engage the operator's hand so that the operator may operate the tool without gripping the barrel thereof.

Abstract: A wrench adapter assembly is provided that can adapt a conventional manual or power wrench to be used to grasp and rotate a smooth-surfaced cylindrical object. The wrench adapter assembly includes of a pivoting hook, a biasing means for the hook, a wrench adapter with a multisided flange for engaging the jaw of a wrench and a concave jaw. The pivoting hook is in circumferential alignment with the concave jaw so as to receive a smooth-surfaced cylindrical article. The flange shoulder has sides that match up with the sides of the jaw of the wrench. Once the wrench adapter assembly is secured within the wrench jaw, it may receive and hold a smooth-surfaced cylindrical article. The wrench adapter rotates with the jaw of the wrench. Thus, the wrench may be used in combination with the wrench adapter assembly to rotate smooth-surfaced cylindrical articles.