The piece in this photograph sits on the wooden rim of a Nechville banjo and is the piece that is turned inside the Heli-Mount frame by the Heli-Mount Wrenches. This piece is threaded and turning it increases pressure on the rim/tone ring and in turn tightens the head of the banjo. The Nechville Musical Products Company is located in Bloomington, Minnesota and is owned and operated by Tom Nechville.