The bolt that would not budge with an open spanner gives on the first pull once the socket clicks onto the ratchet. This is a socket wrench set built around a fine-tooth ratchet handle and a graded run of sockets that drop onto the drive square with a click. The ratchet reverses with a flick of the switch, so you keep the socket seated and work the bolt back and forth without lifting and re-setting the tool each stroke. The sockets are laid out in size order in a fitted case, so the one you nee…