Nice rollers and easy to use but not good for anything other than a light bench. I attached them to my newly built carpentry table, which weighs only 120kg at best, and they buckled their flat arm and began to splinter. Another, I'm sure, will follow suit and the bench will be unable to move, dragging the broken end of the leg with it. Also, the casters are attached with a single raised bolt that is not flush with the bracket, so the gap tends to "squirm". It's a shame as I had high hopes.