
Female end has no locking grooves. Instead, only one of the 4 sides has a locking hole. Except for the kit that was sent to me, only 2 of the 3 extensions had a locking hole. Even those that have a hole will have the extension fall off if you don't choose the correct one of the 4 orientations to attach to the ratchet. Usually where meanness cannot be achieved by law.

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