How Ratchets Work

A #ratchet is a handle that snaps into one end of a socket by means of a square-drive connector. The other end of the socket fits over a fastener. A #mechanism in the ratchet allows the handle to engage and tighten the fastener when you swing it in a clockwise direction and turn freely when you swing it counterclockwise. A switch on the ratchet reverses the action to loosen the fastener.

Video courtesy by Поделкин (podelkin)

Видео How Ratchets Work канала Engineering and architecture