|Key-stop No. 2
This is an elliptical dome-shaped cap
with two holes,
one in the centre and one towards one end, which also is fixed
under the handle.
It can be used to lock the key in the normal or either operated
position, in the
first case using the central hole and in the other the offset
hole. To release
the stop, the handle must be unscrewed completely and it is
therefore only recommended
for guarding keys which are used infrequently. In other cases,
Nos. 11 or 16 should be preferred.