Does PT-A support both ultrasonic scaling and polishing?

Yes. The PT-A attachment supports both ultrasonic scaling and polishing, so you can use it to clean (scale) and polish with the same device when attached to a compatible ultrasonic scaler.

Yes — the Woodpecker PT‑A Dental Ultrasonic Scaler and Air Polisher is designed as a combined unit that supports both ultrasonic scaling and polishing (via an air polishing system). It automatically switches between ultrasonic mode when using the scaler handpiece and air polishing mode when using the polishing handpiece, letting you perform effective calculus removal and polishing with the same device.