EASTON SUPERDRIVE MICRO SHAFTS 950 1 DOZ. Easto's new Superdrive Micro 4mm arrow is the latest addition to the popular Superdrive family of products. The Superdrive Micro is Easton's highest performing all-carbon arrow designed for all-purpose outdoor tournament use from target to field to 3D. Engineered to provide the lightest grain-per-inch weights possible in a given spine range, the Superdrive Micro will maximize your shooting range and minimize your pin gaps, allowing for higher velocities both out of the bow and tighter gaps downrange.