I bought a bunch of their f clamps when I got started, they’ve seen a fair level of use and none have failed though they all need a touch of oil on the threads which always feel like they’re seizing up. Only had one of the regular quick clamps and broke it first use while their heavy duty versions seem better then the regular use or wind and are a real bargain. Don’t seem to be able to wrong for the price if you need clamps to build the collection until they can be replaced with better. Ace hardware has the new jorgensen 6" clamps for 5.00 so I now have the dozen I like to have on hand while I will still keep the 6 HF ones as back up should I need more.