But wit, we still do not have the upper hand in this business. We must consider another way of expressing phrase.
To hand it to someone. For example, I must hand it to you for understanding what have discussed this far.
You can also lend a hand to someone but without really giving up your hand.
You lend a hand when you help someone. You offer them a helping hand.
If someone is kind enough to lend us a hand then we surely do not want to bite the hand that feeds us.
We do not want to repay his kindness by treating him badly.
Now where that out of the way we have a free hand to continue examining other hand expressions.
To have a free hand in a situation is good. It means you are free to act without getting permission from someone else.