US Patent 11858110 Powered fastener driver and extension

A powered fastener driver for driving fasteners into a workpiece includes a driver unit and a handle unit selectively and removably attachable to the driver unit. The driver unit includes a housing, a motor, and a first coupler. The handle unit includes a battery receptacle for receiving a battery pack, a trigger, and a second coupler. The first and second couplers selectively engage one another to mechanically and electrically connect the driver unit to the handle unit.