The GilletteLabs blade refill cartridge by Gillette can be used with all GilletteLabs razors. GilletteLab's mens razors include the world's first razor with exfoliating technology built into the handle, for a shave as quick and easy as washing your face, and the world's first Heated Razor, for soothing warmth and feeling of a hot towel, barber shave. This innovative male razor blade refill features Gillette's best razor blades. The razor blade refill cartridge has an opening in the middle where the exfoliating bar and the heated bar on the razor handle fit and snap into place with an easy 'click'. Fits all GilletteLabs razors: use with GilletteLabs with Exfoliating Bar and GilletteLabs Heated Razor Incredible comfort and closeness: thanks to Gillette's best blades* *first four blades Seamless efficiency: Gillette's sharpest blades* for a smooth shave with less tug and pull** *first 4 **vs. Sensor3 Ultimate precision: includes a trimmer on the back for hard-to-reach areas and precise edges Environmentally friendly: these razor blades are recyclable with Terracycle