A swift sharpener

It might sound like a hair removal product for women, but Razorpit is instead a rather neat device that significantly prolongs the life of your razor (via the principle employed in a traditional barbershop sharpening 'strop'). All you have to do is drag your trusty face-mower along its rubberised panel a few times to leave your blades clean, shiny, and good as new. The Danish innovator behind it claims you’ll get 150 uses from a single razor cartridge - great news for us, probably not so great for Gillette. £20, from Mankind 

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