Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
I use to have one in the basement of our home that we poured into a cement wall when we built the house. It was a combination lock and designed for that purpose. It may have been a Sentry, can't remember for sure. I don't think there are too many manufacturers for them.