This knob was used on the 1926-27 Coupe and Tudor Sedan. For the Model A's, it was used on the 1928-29 Closed Cab Truck door latch, as well as the 1928-29 Roadster, Roadster Pickup, and Phaeton with the early style door latches that didn't have outside door handles. Polished stainless steel. Has female 1/4-20 threads inside.