The HDS Line of 219 Sprockets are the absolute highest quality of sprocket available to the karting public. Made from .160-6061 T6 aluminum on a Mori Seiki NH4000, these CNC'ed sprockets are 100% true with zero oscillation (.38mm-.51mm) as found in other stamped Euro sprockets. The tooth is radiused, not angled, to ensure smooth roller contact even during axle deflection. All rough product is hand de-burred following the machining process and inspected for quality before receiving a true semi-hard coat annodization. These sprockets are superior by design, incorporating an industry leading coating, lightweight design, and Aero Space accurate machining. The HDS 219 Sprocket is the last sprocket you will ever have to buy and perfect match to the HDS 219 racing chain.