This is an antique mechanical pencil sharpener manufactured by the Roneo Company. The device features a heavy cast-iron frame with a black japanned finish and is equipped with a planetary gear-driven helical cutter accessible through a hinged side door. It utilizes a horizontal twin-tube feeding mechanism. A circular lithographed label on the main cylindrical body displays the text Automatic Screw at the top, RONEO in the center, and PENCIL SHARPENER at the bottom, with additional notations for PATENTS PENDING and manufacturer information referencing a New York office. The unit includes a sliding metal shavings drawer and an integrated C-clamp base for table or desk mounting. The manual crank handle is finished with a turned wooden grip.