A cutting device includes a cutting blade formed of metal and having a forwardly disposed toothed portion and a rearwardly disposed tapered shank portion being tapered in shape and having outwardly extending projections, and a handle portion formed of plastic and provided with a slot defined therein for accommodating the tapered shank portion of the cutting blade. The illumination system comprises at least one movable optical element, such that a projection beam of radiation can be shifted around a central position. In a second embodiment, a stud shaft is affixed to an end cap, which is, in turn, affixed to a propeller shaft. Then, a substance having an effect opposite to the inhibition of PTEN phosphorylation or dephosphorylation thereof, e. The ratchet wheel has a mounting part and a plurality of teeth.