All of my jump rings are hand made, manufactured on steel mandrels and hand cut with a precision saw. All jump rings are polished in a tumbler with stainless steel shot, and then individually inspected under a magnifying glass. And since I hand manufacture all of my jump rings, I can provide them for you in any quantity over 25. If you need 283 for a project, that is all I will charge you for. I do always throw in a few extra just in case either of us messes one up! If you are concerned about quality, email me your address and I will send you some base metal jump rings for free for you to inspect.