Review on 🔧 Efficient Valve Spring Compressor Tool: XtremeAmazing Aluminum for Quick and Easy Compression by Rodney Mendoza

As Steven Peterson's review shows, the bolt threads are larger than the valve spring seat cup. This tears the threads. THERE IS a solution, provide another screw or buy 2 of them. As long as you do not fully unscrew the side change screw, you will not destroy the tool guide threads. But for that price you can buy a tool that uses a smaller screw that doesn't have this problem.