Adapter for a handle and a cartridge of different razor systems

An adapter for coupling between a razor handle and a razor cartridge together, the adapter being a separate component from said razor handle and said razor cartridge, the adapter comprising:

• a handle engaging portion comprising:
• at least one wall that defines a receptacle for receiving the razor handle;
• a first handle protrusion extending from the at least one wall;
• and
• a second handle protrusion extending from the at least one wall and being spaced from the first handle protrusion;
• wherein the first handle protrusion and the second handle protrusion are inside the handle engaging portion and configured to engage a first recess and a second recess, respectively, of the razor handle;
• a cartridge engaging portion coupled with the handle engaging portion, the cartridge engaging portion comprising:
• a stem that defines a first recess and a second recess for selectively engaging a first cartridge protrusion and a second cartridge protrusion of the razor cartridge;
• a tongue member slidably coupled with the stem and configured to contact the razor cartridge.