Omega 29023 Magic Lift Black Low Profile Hydraulic Service Jack - 2 Ton Capacity 2-1/2 inches low profile design for maximum access which fits easily and safely under vehicle Extra long low side frames designed for long reach under the car chassis Universal joint release mechanism provides precision control of load descent in any handle position Wide stance and low center of gravity provides optimum stability under load stress A built-in bypass device protects hydraulic system from over pumping damage, US patent number: 5,946,912