A manicurist's bit for shaving away layers of an artificial fingernail. The bit comprises an elongated body portion having a right circular cross section, and has a plurality of angled knurls extending along the width of the body portion. In a preferred embodiment, one end of the body portion is concave....http://www.google.de/patents/US4874001?utm_source=gb-gplus-sharePatent US4874001 - Manicurist's bit
