Abstract: The present disclosure is directed to a plurality of individual protective safety razor head unit open top casings and a tray for storing the plurality of casings in side-by-side relationships. Each of the casings are adapted to retain a single safety razor cartridge unit therein, each of which have at least one blade and a head cartridge member to which the blade is permanently secured and which also provides a guard surface. The head unit is detachably engageable with a safety razor handle. Each casing defines a single chamber in which a single shaving head unit is retained. The structure in each casing retains the head unit therein against accidental removal in such a manner that the cutting edge of the blade is protected against damage and wherein the head unit is engageable by the handle while the head unit is still within the casing. Each head unit when engaged with the handle is withdrawable from its casing by means of rocking the handle.