Abstract: A protective casing for a shaving head has a hollow structure for receiving the shaving head. The hollow structure has a first side wall, a second side wall opposite the first side wall, and means for engaging the shaving head therein. The protective casing includes at least one projection on the outer surface of the first side wall and one or more projections on the outer surface of the second side wall. The projections on the second side wall form a space for interconnectingly receiving an element having the same shape as said at least one projection on the first side wall, whereby a plurality of protective casings may be interconnected.

Abstract: A safety razor blade tool comprises a substantially rectangular, single-edged safety razor blade having a cutting edge and an opposing non-cutting edge and a thermoplastic protective cover fixedly attached to the non-cutting edge. The protective cover is substantially coextensive with the length of the non-cutting edge of the blade and has a resilient, slip-resistant surface. The protective cover comprises two substantially identical, complimentary cover parts. Each cover part comprises an injection-molded substantially rigid inner layer of thermoplastic material and a rubberized outer layer covering the rigid inner layer. The outer layer comprises a compatible, injection-molded thermoplastic rubber.

Abstract: A utility knife system comprises a handle assembly, a blade assembly, and a protective blade cover. The handle assembly and the blade assembly have complementary latching mechanisms for easy exchange of blades without opening the handle. The protective blade cover functions cooperatively with the handle assembly and blade assembly to ensure that a user does not touch the cutting edges of blades while exchanging them.

Abstract: A folding disposable razor includes a shaving head which folds into the razor handle and is aligned with the handle when in an open or extended position.