Safety razor entitled "Fuck Everything, We're Doing Five Blades" predicted the release of five-blade cartridges, two years before their commercial introduction. South Korean manufacturer Dorco released their own six-blade cartridge in 2012, and later released a seven-blade cartridge. Gillette has also produced powered variants of the Mach3 (M3Power, M3Power Nitro) and Fusion (Fusion Power and Fusion Power Phantom) razors. These razors accept a single AAA battery which is used to produce vibration in the razor; this action was purported to raise hair up and away from the skin prior to being cut. These claims were ruled in an American court as "unsubstantiated
Straight razor bumps". One of the recommended actions for those so affected is to switch to single blade use. Others simply like the good results and the satisfaction of maintaining the blade themselves. Yet others cite aesthetic reasons in addition to the practical ones. A well-made blade, in a nice handle with a well-crafted etching and decorated shank, carries a sense of craftsmanship and ownership difficult to associate with a disposable blade cartridge. Finally, a well-kept razor can last for decades, and can become a family heirloom that can be passed from parent to child. For all of these reasons, devotees of