At National Custom Hollow Metal, our specialty is custom-building stainless steel doors and frames to our clients’ exact specifications, and shipping every order on time. We stand behind all of our products, and take a lot of pride in our reputation for providing legendary customer service, and generating repeat business. But we never rest on our laurels, and are always looking for ways to provide additional services to our clients. And when our clients mentioned how much trouble that they had obtaining Existing Opening Countersunk (EOC) anchor bolts, we listened!