Originally Posted by
billrule
Can't help thinking that they wouldn't design that half-circle into the socket without a reason. If the pole/handle had a simple hook in the centre, it could be inserted into the soket, and turned half a turn, locking it in and allowing it to pull the hook back. It could also be simply released, all at arm's length. None of that suggests an actual use, however, except that it's function may have been to sit somewhere, perhaps separating something, until it was moved. Would therefor not show any wear, or need a sharp edge.:?