The JBR socket is made from a state-of-the-art thermoplastic material, specially designed for billiards. Longoni's technicians decided to replace the famous CBR2 material for various reasons. JBR sockets are more impact-resistant and have a smooth surface for greater chalk impermeability. They can be easily glued with Longoni 977 glue and have been tested and used by professional players in the game. JBR sockets are available in various sizes and lengths to fit every different Longoni shaft.