WORKS ON BANJO HEADS. NICE TOOL FOR BANJO PLAYERS...USE ALONG WITH YOUR EXISTING NUT WRENCHES - Meant for precise tensioning of drum heads, it works well for banjos, too. Ensures even tension on every bracket hook. Practical and effective -- it removes the guesswork. Has an adaptor that fits over most traditional nut wrenches, allowing you to uniformly tighten hex nuts. Does not work with standard-drive sockets.