The Autool Brake Fluid Quick Coupling Adapter is an accessory for brake fluid replacers and brake bleeding equipment. The part forms the connection between the supply hose of the bleeding device and the brake fluid reservoir adapter on the vehicle. The coupling features a knurled outer sleeve for a firm grip and a threaded connection on the top side.

Thanks to the quick coupling mechanism, the adapter can be connected or disconnected from the hose without tools. The user pulls back the outer ring, places the counter coupling, and releases the ring to lock the connection. This prevents brake fluid spillage when switching between different vehicle adapters and speeds up the work process during brake fluid replacement and brake system bleeding.