The SD73 features a coverstock that is so agressive it is not allowed on the PBA Tour. The Extreme Chaos is modified to project through the track as it dries up from lane play. The future of the game is Proactive Maintain traction in the oil, and wont overreact without it. With extra hook, extra power and an even arc right out of the box. Much like the Zone Pro AzureTM in overall strength, but cleaner through the front, this is the Danger Zone Pro for the high-performance stroker needing a powerful hook.
Special additives allow it to hook on even the heaviest oil pattern.