Patent ID: 8549754

Claim:
A utility knife comprising: a rotatable head unit having first and second faces with a bolt receiver hole passing through the center of each face, each of said faces further including a plurality of raised locking ridges; said rotatable head further including a knife blade receiver slot; a slideable locking mechanism having a proximal end, a distal end, and a lock grip, wherein said slideable locking mechanism proximal end comprises a notch adapted to receive one of said plurality of raised locking ridges located on said rotatable head unit; a disposable knife blade having three sharpened edges and a bolt receiver hole located in the center of said blade, said knife blade adapted for the insertion of one of said three sharpened edges into said knife blade receiver slot of said rotatable head; a housing having a proximal end and a distal end, wherein a bolt receiver hole is located in proximity to said proximal end, and wherein said distal end provides an ergonomic grip; said housing further including a switch receiver slot adapted to receive said lock grip, wherein said lock grip is adapted to slide between a locked and an unlocked position within said switch receiver slot; and a locking bolt threaded through the bolt receiver holes of said housing, said rotatable head, and said knife blade, thereby locking said knife blade such that two of said three sharpened edges are exposed from said rotatable head.