Don't let him get hold of your hammer, or he'll break everything.
Не позволяй ему ухватиться за твой молоток, иначе он всё сломает.
Definitions
To obtain or take possession of someone's hammer, either literally (the tool) or figuratively (something important or powerful belonging to someone else). The phrase can also imply gaining control over something that gives another person strength or authority.
