The Hydan Briton 4K Size 1 is designed to be installed beneath floor level and encased in reinforced concrete. This safe comes with a recommended insurance rating of £4,000 cash or £40,000 valuables and is secured by a high security mechanical dial combination lock, which doesn't require power and is fitted with drill resistant plates. The body of the safe is constructed of high quality steel with continuously welded seems and the neck engages into the steel collar to allow 120mm of concrete protection over the top plate.