Abstract: A utility knife includes a holder having two mating halves which combine to develop a first cavity located at a proximal end of the holder, for receiving a blade for active use, and a second cavity located toward a distal end of the holder, for receiving a supply of replacement blades. The two mating halves are joined by a hinge located at the distal end of the holder, and a closure in the form of a captive screw extending between the mating halves at a position between the first cavity and the second cavity. Both the first cavity and the second cavity incorporate a magnet for directly engaging the active blade, and for additionally engaging one or more stored replacement blades.

Abstract: Particular compositions of vinylidene alcohols are provided which are distinguishably characterized by their structure, their biodegradable nature, and by their very low pour point characteristics. These compositions can be used to provide useful surfactants and detergents and to form distinctive ethoxylate derivatives having unusual attributes, such as biodegradability, very high rates of water solubility, nongelling tendencies, and superior wetting ability; and certain of these ethoxylate compositions are synergistic in wetting ability and, unlike related ethoxylates of conventional alcohols, the ethoxylates of certain compositions possess cloud point temperatures within an especially desired range.