Abstract: A combination tool particularly adapted for use by operators of semi-trailer trucks. The tool includes an elongate hollow body of rigid material having a pivoted handle or bail on one end and a weight at the other end circumjacent the body. An axially slidable hook protrudes from the weighted end for use in operation of a fifth wheel hitch when extended. An extensible graduated depth gauge is telescopically positioned within the body at the handle end which, when extended, is a depth-type fuel gauge for checking fuel depth in truck tanks. The pivoted handle may be swung away from its axial position to permit extension of the depth gauge and a secondary tool grip is provided circumjacent the body of the tool at the handle end thereof.