Abstract: A cutting tool for a package or the like, comprising an elongated, generally flat and thin housing. An elongated slit extends rearwardly and generally longitudinally from the front end of the housing through a portion thereof. A cutting blade is mounted within the housing and has a cutting edge extending into the slit at an inner portion thereof. An upper front end portion of the housing on one side of the slit has an outwardly extending barb for forming an opening in a package. A lower front end portion of the housing on the opposite side of the slit is tapered inwardly toward the front end of the housing to terminate in a narrow end that can be interested into an opening in a package formed by the barb to position an adjacent portion of the package in the slit where it can be cut by the cutting blade when the housing is moved relative to the package.