Releasable rubber joint/swivel is mounted with an aluminium pin only. The pin is kept in place by a piece of heatshrinkable tubing. To remove a joint : simply cut off the tubing and push the pin out. The joint incorporates a fibre core moulded up in the centre. The fibre core will avoid complete failure should the rubber tear and allows you to finish the race. Also available is the less expensive full rubber joint and the joint with rope core without releasable base. The distance between the mounting hole centers of all joints is 32 mm.�652944�Joint without rope core.