I opened the box right after delivery and found the working tool was rusty on the outside of the tool and on the inside of the threads where the valve was supposed to attach - the threads were so badly rusted that I couldn't even start screwing the valve into the tool. Very disappointed as I had to use it immediately. I sent it back for replacement and hope it doesn't rust either. Every $30 instrument had to be coated with some kind of preservative by the manufacturer before it was shipped. Update: The replacement arrived in better condition with just some surface rust. I had to crimp the dismantling tool hook as it was slightly larger than the hole in the rim and I was able to remove and replace 2 valve stems.