The claimed invention relates to an arrangement for securing a handle bar ( 14 ) to a portable tool ( 10 ). The tool ( 10 ) comprises a power source ( 11 ) placed in one end of a tube ( 12 ) and a working tool placed in the other end of the tube ( 12 ). The handle bar ( 14 ) is secured to the tube ( 12 ) by a holding device ( 15 ) placed between the tube ( 12 ) and the handle bar ( 15 ). A sleeve ( 16 ) is placed around the tube ( 12 ) and fixed to the tube ( 12 ). The inside ( 25 ) of the sleeve ( 16 ) is shaped to match the cross section of the tube ( 12 ) and the outside ( 18 ) has a non-circular shape. The sleeve ( 16 ) is at least partially surrounded by a layer ( 19 ) of an elastic material and the holding device ( 15 ) is provided with a cavity ( 21 ) with a similar shape as the outside ( 18 ) of the sleeve ( 16 ) clamped around the sleeve ( 16 ) and the layer ( 19 ) of elastic material.