Fans of the Black Hole Pro HD V2 can rejoice as Axiom’s unique color combinations join the mix! The Axiom Pro HD features all the upgrades in the Black Hole Pro HD V2. 12 outer and 12 inner chains equidistantly oriented for zero weak pockets - reducing cut throughs and pole bounces. Sturdier chain rack, deeper cage, and stronger base when compared to other Axiom Models. Uniquely engineered sturdy all-metal construction is designed to assemble in under 1 minute. All-Metal construction with a unique threaded tension connection design. Built to standard PDGA height and size regulation.