1-1/2 Ton Hydraulic Long Jack • Hydraulic system is protected from internal damage by a patented by-pass mechanism, U.S. Patent No.5,946,912 • Machined and polished cylinders with die-cut threads provide non-abrasive leak-free, durable performance • Fabricated from hard-cast steel with heat-treated critical stress areas • A wide, rugged base provides stability and strength