Erva TWIST -In Ground Socket for 1-Inch Poles Twist In To 20-Inch Depth

Does this fit a droll yankees gp garden pole, which is 1" outside diameter?

What is the difference between this in-ground socket and the Achia corkscrew in-ground pole base

how many ground screws are in this sale?

How tall is the pole after it’s screwed into the ground?