placing the associated blade in a position such that an acute angle is formed between it and the central axis of the housing with the blade abutted against the front wall of the housing designating the apex of the front wall of the housing as the north position the position associated with the acute angle is defined as the southwest position with respect to one blade and the southeast position with respect to the other blade the locking lever is further positionable within the second slot of one of the adjusting plates for placing the associated blade in a position such that a perpendicular angle is formed between it and the central axis of the housing the position associated with the perpendicular angle is defined as either the west position with respect to one blade or the east position with respect to the other blade the locking lever is further positionable within a third slot of one of the adjusting plates for placing the associated blade in a position such that an obtuse angle is formed between it and the central axis of the housing the position associated with the obtuse angle is defined as either the northwest position with respect to one blade or the northeast position with respect to the other blade the fifth major component is the handle 70 the handle is rigid in structure.