Get the extended reach without losing sockets into appliances or machinery. [APPLICATION]: Sockets connect to the locking extension bars with an easy-to-use slide and release collar and utilizes square drive radius corners to reduce socket wear.
These extensions are great for the times I have to remove/install a fastener in a difficult to reach area and don't want my sockets/extensions falling apart. I've only used these a few times now, but they seem to do the trick. Note that they will only lock if the female receptacle of the socket or extension you are connecting to has the little indents inside which allow the locking ball to extend outwards—I found out that not all sockets or extensions have these indents.