TRANGO BallNutz Protection Set (1-5) Parallel-Sided Cracks BallNutz are thin crack protection at its finest Using a sliding ball/ramp concept, BallNutz will protect parallel sided cracks, flares, pin scars and bombays from 3mm to 16mm Protects Small Cracks, pin scars, flares and pods from 3mm-16 mm Set of BallNutz sized #1 - #5 29-71g