Embodiments disclosed herein are directed to negative pressure treatment systems and wound dressing systems, apparatuses, and methods that may be used for the treatment of wounds. The portable surgical instrument includes an end effector assembly and a housing operably coupled to the end effector assembly. All of the rollers are mounted to the outer side of the beam. The components are stamped from steel sheet and plate, and folded into the desired configuration, and assembled without the need for machining or welding.