The Shock Drive is a lightweight, shop-quality shock pump built from full CNC-machined aluminum construction for maximum quality and durability. The ergonomic handle provides pumping comfort. The diaphragm gauge offers excellent accuracy. The zero-loss chuck design ensures accurate gauge readings, sealing the valve pin before unthreading. A tough Composite Matrix case houses gauge and enhances grip. 400 PSI (27.5 bar) max.