Safety razor become locked into buying their proprietary cartridges, for as long as the manufacturer continues to make them. Subsequent to introducing the higher-priced Mach3 in 1998, Gillette's blade sales realized a 50% increase, and profits increased in an otherwise mature market. The marketing of increasing numbers of blades in a cartridge has been parodied since the 1970s. The debut episode of "Saturday Night Live" in 1975 included a parody advertisement for the Triple Trac Razor, shortly after the first two-blade cartridge for men's razors was advertised. "Mad" magazine announced the "Trac 76", arranged as a chain of cartridges with a handle
Razor Blade named the "Oyster", the car was soon called the Razor Blade. The car was driven by S. C. H. Davis for the attempt at the one-hour light car record. The car lapped consistently at the Brooklands circuit at 103–104 mph but the front offside tyre came off and after having a new tyre fitted, the same wheel shed its tyre several more times at speeds higher than , until the record attempt was abandoned. The Razor Blade was raced regularly during the 1950s and was sold to the Harrah Motor Museum in the USA, that subsequently became the National Automobile