Manufacturers of steel frames for use in interior door sets. BOS Best Of Steel has been producing steel frames since 1967 in countless varieties for the most diverse types of requirements in buildings from 'A' for administration right though to 'Z' for zoos. Our frames can be found anywhere, from cellars to penthouses, suited to the respective area of use. We are continually optimising the steel fame. Our aim is to be able to join any door with any wall perfectly, taking the specific door technology into account. This means customised co-ordination of design, function and efficiency. BOS frames work equally well with timber, steel or glass doors. Our consultants know the specific demands of the construction industry and are therefore able to plan on a part with you. Over the years we have gathered expert knowledge in many specialist areas of use as well as in administration and residential buildings.