I carry a lot of expensive equipment in high-end cases and have always worried about either my trunk getting broken into or equipment stolen from hotel rooms or even my residence. Problem solved with the 3/8" very securely mounted in my trunk and the 9/32"securing my equipment. I tried to cut a link off just to test it using everything I could find. An hour later I gave up and realized that I had spent my money well. This is not second-rate security.