Any tricks to removing a stuck/stubborn/rusted-in place bleeder?

I had to replace a valve on my boiler and had to shut off some water valves. Frozen solid. I had bought this on Amazon for the car. Had not used in the car yet, but sorted this on the valves and within 10 minutes it broke loose using one hand. Worked great.

1712445587009306891113404081196.jpg