Abstract: An improvement is provided in a screw gun used in the drywall installation industry. The improved screw gun has a conventional screw driving head at the forward end of the gun. A rear drive shaft extends from the motor of the gun, and an access member is provided at the back of the screw gun to provide access to the distal end of the drive shaft. An adapter member is adapted to be received in and withdrawn from the access member. The adapter member has a rotatable cutting tool associated therewith. Rotational motion is transmitted from the drive shaft to the rotatable cutting tool by the adapter member when the adapter member is received in the access member and the rear drive shaft is driven by the motor.

Abstract: An improvement is provided in a screw gun used in the drywall installation industry. The improved screw gun has a conventional screw driving head at the forward end of the gun. A drive shaft extends from the motor of the gun, and an access is provided at the forward end of the housing of the screw gun to provide access to the drive shaft. An adapter member is adapted to be received in and withdrawn from the access member. The adapter member has a rotatable cutting tool associated therewith. Rotational motion is transmitted from the drive shaft to the rotatable cutting tool by the adapter member when the adapter member is received in the access member.