Are Close at Hand?

: near in time or place I always keep a few tissues close at hand.

What does the phrase is at hand mean?

phrase. If something is at hand, near at hand, or close at hand, it is very near in place or time.

Is it on hand or at hand?

At hand seems to me as if you have something in reach. On hand is if you have something in stock. And in hand can be used as if you have more time at your disposal.