The super light Shock Drive shock pump features a full CNC-machined aluminum main construction for maximum quality and durability. Its ergonomic handle enhances pumping comfort and the unit provides up to 400 psi (27.5 bar). The diaphragm gauge offers excellent accuracy and is encased in a tough composite matrix that also improves grip. The unique zero-loss chuck design releases the valve pin, which seals the shock, before the pump threads off. The shock drive is excellent for shop use and compact enough to toss in a pack for trailside adjustments.