A screw for fastening two wooden members together which can be turned with a smaller force when the screw is driven into both two members so that the distance between the two members is easily and accurately adjustable. The pivoting lever is tiltable by swiveling a hand brake lever into an engaged position, in which the pressing element exerts force against a wheel. The semiconductive material is recessed below a top surface of the workpiece. Then during a further continuing impact stroke, the top and bottom horizontal sections provide a \u201cthrowing\u201d action. The prospecting voltage signal is then compared to a set voltage and a difference signal is generated, recorded and analyzed. The transmitted spread data vectors are received by each of a plurality of receiving antennas as a received version, and the data is recovered using the received versions.