These are the best bar / pipe jacks I have ever worked with for the small shop like myself! Cant afford conveyors to feed heavy bar stock into saw and the just are the best! I had 5-3/4” dia 4340 solid bar on them last weeks weighed almost 1000lbs and these units performed perfectly once on the racks your job becomes easy. Just wish they had more of the small 20” ones with 4 rollers but I will take what I can get very well built! No brainer if you need a tool like this!