You flick your wrist with a flourish, causing one object in your hand to vanish. The object, which only you can be holding and can weight no more than 5 pounds, is transported and stored within a small extra-dimensional space. Until the spell ends, you can use your action to summon the object to your free hand, and you can use your action to return the object to the extra-dimensional space. An object still in the pocket plane, when the spell ends appears in your space, at your feet.
This is a Dunamancy spell and it should be discussed beforehand with your DM.