The 1/2″ Stainless Steel (303) Step Up Shaft Adapter – Coupling with Keyway is designed to modify, extend, or repair an existing shaft by providing a larger machinable output shaft. Precision-machined from 303 stainless steel, it features a clamp-type coupling with a keyway that provides increased torque capacity and fixed shaft phasing. The adapter eliminates the need for complete shaft replacement or welding while delivering a secure, non-marring connection. Stocked In: Steel, Stainless Steel