Produces vacuum or pressure at the turn of a switch. Comfortable ergonomic design. One-finger trigger vacuum / pressure release. Has durable, accurate diaphragm style compound pressure / vacuum gauge. Includes everything for performing hundred of automotive diagnostic and mechanical test, and one person brake bleeding This new pump is capable of producing either vacuum or pressure with equal precision and convenience. The combination of dual-vacuum/pressure capability and powerful performance expands the applications of the pump to include turbo- and super-charger diagnostics, fluid transfer, windshield repair, cooling system pressure testing, and pressure brake bleeding. In addition to performance improvements, the look and feel of the pump has been updated. It fits more comfortably in the user's hand, and both vacuum and pressure are created on the squeeze stroke for one-handed operation.