The end pin is a modified screw that holds the tailpiece end of the dowel firmly to the rim. The end pin often also serves as an attachment point or stability point for the tailpiece.This banjo is thought to be a 1930s era Slingerland. The Slingerland Musical Instrument Mfg. Co. was based in Chicago, Illinois and was owned and operated by H.H. Slingerland. The company changed names several times, including The Slingerland Banjo Company, Slingerland Banjo and Drum Company and others.