I always keep a pen at hand.

I always keep a pen on hand in case I need to take notes.

She is hands down the best singer in the competition.

They link hands while walking in the park.

Your belongings are in good hands with our professional movers.

They hold hands while walking in the park.

On the other hand, she enjoys playing video games.

Please hand over the documents to the receptionist.

On the one hand, I want to go on vacation, but on the other hand, I have a lot of work to do.