Best used for moving things less than about 40 lbs. With my untrained eye, there seemed to be about .020 " of distortion along the rail with the load that I used. Please note however that I have yet to complete my machine. Besides the physics which would not likely change with the supplier, the rods seem to be well machined, and if they are plated, there is no mars in the plating. Very good and accurate for the price.
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Very Nice Product
October 15, 2013
Reviewer:
rkjohn
It is a steel rod
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Great Product
July 11, 2011
Reviewer:
ac from lorain, Ohio
Building a CNC machine works great for my Y-Axis of my machine.
Good Quality Product!! 
Great Product 
