The flange is a metal ring that sits on the wooden rim of the banjo. This particular flange has holes drilled in it so that the hooks can pass through it. The top of the hooks hold onto the tension band and cause the head to be tight when the nuts are tightened on the hooks. The nuts will be directly under the flange. Tightening the nuts pulls the flange tight onto the rim and this pulls the hooks down and in turn pull the tension band which increases tension on the head. Stelling Banjo Works, Ltd is located in Heards, Virginia and is owned and operated by Geoff Stelling.