To easily perform removing work without using a stepladder after using a form-tie and a beacon, eliminate work for getting up and down on the stepladder, and accomplish work in efficient, less-fatigue, trouble-free, safe, quick and independent manners and at a lower cost.

A holder 3 is provided near the end of an extension body for supporting an electric tool and an operation lever 9 is provided corresponding to a operation part such as switch 11 of the electric tool. An operation handle 4 to be connected via a connector such as a wire 13 is provided at the base end of the extension body for operating the operation lever in association. A movable part 5 is provided between the holder and the extension body so as to change the angle of the holder.