Main Input shaft World War II VW Shaft (2019) Filmaffinity Splined Shaft Stock _ Metric Splined Shafts in Stainless Steel from Detailed view of a metal drive shaft showcasing its components and Custom Machined Steel Aftermarket Vehicle Gearbox Main Shaft Output. Private Reserve shafts feature ultra tight tolerances for players seeking to play their best Five weight options with multiple flex offerings Parallel shafts providing fitters with numerous playability options High modulus graphite core Each SteelFiber shaft features over 59 miles of unique steel fiber material exclusive to Aerotech This provides unmatched hoop strength and stability from a graphite iron shaft