These traces are either made by three separate styli or a single multipurpose stylus. Hz, using light weight pickups employing jeweled styli. These included carry cases, screen protectors, styli, protective bump cases and docking stations. Traditional and typical styli used for technical drawing are pencils and technical pens. All styli in the Prestige series are user replaceable. Styli were also used in the form of ivory or ebony pencils. The first three abdominal segments bear limb-like appendages called "styli". The styli for vinyl records were also made out of sapphire or diamond. In 2006 the Company bought 'itp', a German manufacturer of precision styli.