Pneumatic power assisted machinery for decorative metal engraving, glass engraving, stone setting, carving, sculpting and engraving wood art, and scrimshawing; Pneumatic power assisted machinery for engraving jewelry, engraving jewelry art, engraving wood art and engraving glass art; power operated machinery featuring motorized abrasive wheels for sharpening hand engraving tools and gravers used in decorative metal engraving and jewelry making