Radz 'Jez's Knob'
Developed in Australia, a neat moulded plastic deflector, a little larger than a UJ, which fits in the mast track of your board , in front of the mast foot and helps to deflect the mast during catapults etc. helps to minimise accidental damage to the sides and nose of boards. Stands 3 inches above deck, but does not interfere with sailing.