Special 1.5mm dense aluminum framework with unique flex characteristics creates more overall traction and improves steering. Suitable for low to moderate traction carpet conditions, and high traction asphalt tracks. The narrow framework is 84mm wide with tapered bottom side of the framework to cut back contact between your framework as well as the ground during cornering to enhance speed. Especially CNC-machined countersunk screws from HUDY Spring Steel #913305 (M3x5), #913308 (M3x8) and #913312 (M3x12) must be used to help make the set up feasible. Optional screws are available additionally as an entire set #913300 featuring 33pcs of special 110° screws to fully install the framework.