A wide, rugged base provides stability and strength. The hydraulic system is protected from internal damage by a patented bypass mechanism. It is fabricated from hard cast steel with heat treated critical stress areas. The machined and polished cylinders with die cut threads provide non-abrasive, leak free, durable performance. This jack can be used in vertical or angled 5 degree from vertical position and the unique cross-type forged release valve assures positive control.