Product review (5 stars): 3 Prong (3 Wire) Dryer and 4 Prong Wall Socket
Worked great even though the dryer was originally a 3-wire. Instruction video from recommended internet link was foolproof. WARNING! Video says to avoid dropping screws from dryer into dryer shell. I dropped the last one and never could find it, but did find $1.37 in change. Fortunately I had another screw that was same thread and diameter, and cut it to length.