Abstract: A device for carrying and adjusting a tool has a frame and a base member which is rotatably connected to the frame about a first axis with a main arm pivotally connected at one end to the base member and at the other end to a lifting-arm holder with a yoke pivotally connected at its central portion to the main arm at some distance from one end thereof. A piston rod part of a first cylinder assembly is pivotally connected to a projection projecting at an angle from the main arm, and its cylinder part is pivotally connected to one arm of the yoke with a piston rod part of a second cylinder assembly pivotally connected to the base member and its cylinder part pivotally connected to the other arm of the yoke and with a link arm parallel to the main arm pivotally connected at one end to the other arm of the yoke and pivotally connected at its other end to the lifting-arm holder.