DuffNorton Ratchet Jack, 20 ton Top, 10 ton Toe, 28 in Maximum Height, 8 in Base Width, 11 in Base LengthDuffNorton ratchet jacks are available in 5 to 20 ton capacities for lifting and lowering loads in a wide range of applications These jacks feature DuffNorton’s exclusive patented spring mechanism in one selfcontained unit can be adjusted, repaired or replaced without dismantling jack Load is moved one notch at a time both lifting and lowering