Little pricey but better than other similar products. Used a couple of these to make a bed slide for my truck. Super sweet. Dreaming up all sorts of cockamamey uses for half ton racks now!
Just what I wanted. Very heavy duty, ball bearings. Careful, it might be more than you want. I needed something that would carry over 200 lbs when fully extended to 52 inches. These fit that requirement.
LSusann T. 
