I got these for welding projects I do, and so far, they are great. I am currently building a large 26' tri axle car trailer and using these stands (6) to support the frame. They are very sturdy and can easily handle the weight which will be about 5,000 lbs. when finished. They adjust quickly and do not move once set. They also have the fine adjusters with the screw heads to fine tune the level. Plus, they fold up pretty nicely when not needed. Would purchase more if the need arises.