Walthers Proto MAX(TM) couplers are an easy upgrade for old or new equipment and provide magnetic uncoupling action. They fit most HO equipment, and each realistic coupler features a tough die cast metal head and shank, factory-installed metal knuckle spring, and a separate metal centering spring. Parts for optional plastic draft gear boxes are also included, some assembly required.
 
PLEASE NOTE: Photo shows assembled draft gear box.