Abstract: The combination of a sheet cutting apparatus and a tool. The sheet cutting apparatus has a base with a surface for supporting a sheet material operatively positioned upon the base. A rail assembly on the base has a length. The sheet cutting apparatus further includes a blade assembly. The blade assembly has an operative state in which the blade assembly is movable guidingly in a cutting path along the length of the rail assembly to make a cut in a sheet material operatively positioned upon the base, and is repositionable relative to the rail assembly from the operative state into a separated state. The tool is operable by a user to facilitate repositioning of the blade assembly from the operative state into the separated state.

Abstract: The combination of a base, with which at least one sheet layer can be operatively supported to be cut, a guide assembly, and a cutting blade assembly. The cutting blade assembly includes first and second cutting blades. The cutting blade assembly is selectively changeable between a) a first state wherein the first cutting blade is in a first operative position and the second cutting blade is in a first inactive position, and b) a second state wherein the second cutting blade is in a second operative position and the first cutting blade is in a second inactive position. The cutting blade assembly cooperates with the guide assembly to be movable guidingly in a cutting path.