Because Hi-Lift intimates exactly that on their website, and furthemore the two jacks are sold side by side, for a $10 difference--I was trying to illustrate that 4x4Connections price is actually really good.

This is from the Hi-Lift website:
"Our Casting Jack is manufactured from high yield and tensile strength grades of ductile castings, the same durable metal that we have used for nearly 100 years. Specifications for the Casting and Steel Jack are exactly the same as the all Cast Jack. The difference between the two is that the Casting and Steel Jack contains some stamped high strength steel parts. We stamp and form the parts in-house; that allows us to offer the Jack at a lower price, yet still maintain the rigid quality standards that every Hi-Lift must meet."

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gothamist -- MAXC member
http://www.beatdriven.com/xterra.html ---> moving to http://www.4x4LO.com