"But a certain difference is found among ends (telôn); some are activities
(energeiai), others are products (erga) apart from the activities that
produce them. Where there are ends apart from the actions (praxeis), it is
the nature of the products (erga) to be better than the activities
(energeiôn)." (Ross)

"some are activities:" Aquinas: "riding or playing the zither"

"others are products:" Aquinas: "when a carpenter constructs a house or a
bed."

Now returning to the very first phrase:
"Every art and every inquiry, and similarly every action and pursuit, is
thought to aim at some good;"
The good the carpenter aims at is not carpentry 'per se' but making houses
and beds via carpentry, so the product is a higher good, end.
Thomas