Abstract: A pair of laterally spaced, generally parallel opposite side members are provided and defined corresponding first and second ends. The first ends define aligned notches formed therein opening laterally outward of the side members in directions disposed generally normal to the longitudinal extent of the side members and the notched first side member ends may be hook-engaged over the longitudinal central portion of a turnbuckle assembly having an external gear wheel thereon, with the notched first ends of the side members embracingly receiving the gear wheel of the turnbuckle central portion therethrough. Longitudinal mid-portions of the side members journal a second gear wheel therebetween, and the second gear wheel is mesh engageable with the associated turnbuckle gear wheel. In addition, one axial lend of the second gear wheel projects through the corresponding side member and is equipped with an enlarged hexagonal head (or the equivalent) with which an impact wrench may be operatively engaged.