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" minimum height, 10-5/8" maximum height, 1-5/8" screw extension, 89 lbs operating force, 1-3/4" saddle, full power in vertical or horizontal position. 14 lbs.