Abstract: A combination work tool and holder therefor, wherein the work tool is stabilized during work movement by the provision of an independently movable stabilizer bar mounted alongside and generally parallel to a tool holding bar, a rigid member clamping the bars together in order to increase the rigidity of the tool holding bar. The ability of the stabilizer bar to be independently moved enables the two bars to be clamped together in various positions in order to eliminate interference with working clearances and the like. Additionally a holding block construction for positioning the bars with respect to each other is disclosed.