Hi,
I am trying to source a ring that is used for taking up the tension on a 3 jaw hydraulic jaw set up in the u.k.
It uses the holes in the soft jaws to locate itself after being sized by hand then chuck pressure apllied.
Similar items below
http://www.tradekey.com/product_view/id/82266.htm
Am reallly interestested in the Dorlan ring.
http://www.usshoptools.com/current_y...pdf/PGS_10.pdf
Any information would be welcomed.

Regards Phill