Diffenerce between on hand and in hand?

I think there is a very subtle difference. hand and hand just refers to two hands not necessarily together.hand in hand implies that the hands are connected or together.

At hand can mean something that is within reach or close by. On hand means something that you have with you, or something that is available to you.

hand in hand is when two people are holding each others hands tight.

not all mammals have five fingers and pose able thumbs and our hands are not harry

Hold your hands in front of you ,fingers facing up. fold down fingers except pointer and thumb. the hand that makes an L shape is your left hand. so the other has to be your right. If you mean...