They're practically useless: clenched like iron; on the left, the fingertips embedded in the palm.

In fact, he considers the whole concept of 'screen time' to be practically useless.

The accuracy of their verge and foliot movements was so poor, with errors of perhaps several hours per day, that they were practically useless.

Their eyes are not visible externally and are practically useless, hence the name.

This made blown flaps practically useless as a landing aid on many aircraft.