Well, I went and bought a safe. My wife pointed out that the safe cost more than the guns inside, but that is another story. It is not very heavy and I do need to bolt it down. It has four holes in the bottom. Floor is concrete. I can mark the floor and move it out of the way to drill, but what kind of anchors do I use in the holes in the concrete? I assume the concrete is about 4 inches thick, do I use 4 inch lag bolts? Any help would be appreciated. I want to do this myself. Thanks