Lightweight, durable polyurethane spinners are an ideal replacement for worn stock spinners as aggregate (i.e., sand, salt, etc.) will not adhere to the polyurethane surface. And unlike the metal variety, polyurethane spinners resist impact damage and will never rust.
All spinners have a 1/4" hole for the motor shaft. Closed hub spinners can be provided with hole and keyway for your application.