This brace has a lateral latch that engages a
notch, rather than a hole,
in the side of a flat-tanged bit.
This shows the other side of the brace with a
retention notch in
the flat tang of the bit.
In the Scandinavian countries bits were kept
with a brace on a unique
kind of spring ring. The bits in this photo have to be started
in a shallow
hole created by a gouge. Otherwise they “walk”.
This is a detail of the spring ring on which
bits are stored. There is tiny socket
forged on one end and a needle-like point on the other end.
After all bits are
on a ring, the ends are pulled apart and the point inserted in
James E. Price