Pencil sharpener pencil in position, although they then sharpen them to the usual conical point as for a round pencil, abandoning some distinctive aspects of the carpenter's pencil. Sharpeners with a single blade for use on wax crayons are available, and sometimes included in boxes of crayons. These often have plastic blades, which are adequate for the soft wax. Mechanical pencils dispense the graphite lead progressively during use and thus do not require sharpening; such pencils are sometimes called "self-sharpening". A type of mechanical pencil has a rotating gear mechanism which rotates the lead slightly every time the lead is lifted off
2–0 lead is the worst lead fact the worst possible lead. The cliché was popularized by Czech football coach and television commentator Josef Csaplár in the Czech football community. His use of the term suggested that a 2–0 half-time lead could only end in a defeat and the cliché is known in the Czech Republic as "Csaplár's trap" (Czech: "Csaplárova past"). In Serbia, the cliché is known for being used by manager and former player Milan Živadinović. The cliché was also used by Australian former player and TV broadcaster Johnny Warren. Television pundit and former English footballer Gary Lineker raised the cliché when commenting on a