1-3/8" X 1-1/8" Shaft Adapter Coupling - Step-Down Type, SteelUse as is to make shaft smaller Fully machineable to change size or configuration Eliminates need for complete shaft replacement. No welding required. Clamp type coupling end won't mar shaft. Shaft Adapters are designed to modify, extend or repair an existing shaft and provide a fully machineable male output shaft with minimum effort and expense. For use on standard hardened round shafts, Shaft Adapters are precision machined, non marring, easy to