Minibal Joints are universal ball joints that can be used on woodwind and brasswind instruments at points of linkage. These joints are easily installed and only require minor alterations to the instrument to complete the job. Each joint has a ball-shaped head that rotates in any direction. They move silently without resistance and transform clunky key work into a reliable, smooth action. At the Sax ProShop we frequently install these on Buescher low C# keys.
If necessary, use UltiMax Low Key Oil to lubricate the ball in the nickel-silver housing. Made from stainless steel.