Abstract: A light-weight, easily manoeuvrable jig (30) comprised of a pole (8, 9) for resting on the ground or floor holds a powered tool (5) having a handle (5a). The pole includes a vertically expanding device (9) in the form of a pneumatic cylinder for lifting and lowering the tool (5). The tool (5) is mounted on the jig (30) in such a way that, by using the handle (5a), the tool (5) is, to a limited extent, universally angularly manoeuvrable with respect to the jig (30). Vibration-absorbing elastomeric sleeves (12) and (14) are located between the tool (5) and the jig (30) for absorbing vibrations caused by operation of the tool (5). The expanding device (9) is operated by the use of a pressure regulator valve (10) and a combined height-adjustment and air-release valve (11). In another embodiment, the expanding device (9) is operated by trigger (17) of the tool (5), the pressure in the expanding device being controlled by the pressure regulator valve (10).