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. Unique cross-type forged release valve assures positive load control. Hydraulic system is protected from internal damage by a by-pass mechanism. 6-1/2" minimum height, 11-1/4" maximum height, 1-5/8" screw extension, 101 lbs operating force, 2" saddle, full power in vertical or horizontal position. 21lbs