The object of the invention is a method and an apparatus for conveying tools to a work site along an elongated object, such as along a pillar, a post, a beam or a tree. The apparatus is provided with at least a control system and comprises at least a work device connected to the control system and moving along an elongated object, said work device comprising a frame and moving means for controlling the work device up and down along the elongated object. The frame of the work device consists of two frame halves to be disposed around the elongated object and to be locked to each other, to which frame halves a tool base is fixed for at least the tools needed at the work site.
