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That same year Rotring launched its first drawing board, and the "Tikky" mechanical pencil was released in 1979. The "Art Pen", a fountain pen suitable for calligraphy , was launched in 1984. During the decade, Rotring set new subsidiaries in other European countries, while the "600" mechanical pencil was introduced in 1989.
A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead , often made of graphite , is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use.
Product lines include Sharp Kerry, Sharp P200 series, Graph 1000, Graphgear (500, 800 and 1000), Smash, Orenz, OrenzNero (mechanical pencils or "sharps"); Ain and Hi-Polymer (mechanical pencil leads, erasers); Energel (gel ink pens); Vicuña (hybrid ink ballpoint pen); Pentel Pen (permanent marker), and Sign Pen (fine tip marker).
The cartridge case itself was designed by cutting off the .348 Winchester case to 1.405 in (35.7 mm), turning the rim to a diameter of .610 in (15.5 mm) and opening the case mouth to accept a .510 caliber (12.95 mm) bullet. The first revolvers converted to use the .500 Linebaugh were the Ruger Bisley and the Seville revolvers.