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Most residential contractors install metal jambs only occasionally, not often enough to get a good handle on them. But metal jambs and prefit doors are becoming more and more popular, and though they can be sharp along the edges, they don't bite. A wide variety of aluminum and metal frames are marketed in my area of California, and I often install them on tenant improvement (T.I.) jobs in commercial buildings. But I've installed these frames for both security and fireproofing in custom homes, too. Trust me, it's a lot harder to order metal jambs and prefit doors correctly than it is to install them; if they're ordered right, they go in fast. Ordering Is Key First, be certain to order the proper