Shaving Sword introduced the 'bonded blade' razor, which consisted of a single blade housed in a plastic cartridge. Gillette followed in 1971 with its Trac II cartridge razor that utilised two blades. Gillette built on this twin blade design for a time, introducing new razors with added features such as a pivoting head, lubricating strip, and spring-mounted blades until their 1998 launch of the triple-bladed Mach3 razor. Schick launched a four-blade Quattro razor later the same year, and in 2006 Gillette launched the five-blade Fusion. Since then, razors with six and seven blades have been introduced. Wholly disposable razors gained popularity
American Safety Razor Company and blade production remained in Brooklyn. By 1921, it had produced 1,800,000 safety razors; 110,000,000 razor blades; 1,000,000 shaving brushes; 2,000,000 cakes of shaving soap. By 1942, it had introduced and popularized the phrase "five o'clock shadow". In 1953, it acquired the Pal, Treet and Personna brands after purchasing the Pal Blade Company. These two product names continue to be made today. In 1954 the factory relocated to Staunton, Virginia, after the Brooklyn City Planning Commission's planned civic center encroached on the factory with plans to redevelop the industrial area into office and residential use. The American Safety Razor factory