Center Hole Cylinders are designed for use with screws, rods, cables and pullers. They rated loads from 10 to 60 tons, closed heights from 5-5/8 to 12-11/16 inches and strokes from 2-1/2 to 6 inches. Its feature includes single-acting spring return models, solid bronze gland nuts reduce wear in single-acting rams, quick-connect couplings for fast setup and plain, threaded & grooved saddles.