A combination drywall screw gun and rotary saw device kit featuring a base that has a body, a handle with a trigger, and a drive shaft connected to a motor. The kit has a screw attachment component that functions to install screws that has a screw bit, a shaft lock, a screw drive shaft, a depth guide, and a collet nut. The screw attachment component can be attached to and removed from the base using an attachment means. The kit has a saw attachment component that functions as a rotary saw that has a saw component and a saw drive shaft. The saw attachment component can be attached to and removed from the body portion of the base using the attachment means The kit has a wrench piece for engaging the collet nut to tighten or loosen the screw bit.