The hooks pass through holes in the flange on one end and hold onto the tension band on the other end. It is through this system of parts that the banjo head it tightened. Tightening the nut pulls the flange tight to the rim and then pulls the hook down which then pulls the tension band down and in turn increases tension in the head. A tight head is very important to banjo tone. Stelling Banjo Works, Ltd is located in Heards, Virginia and is owned and operated by Geoff Stelling.