A modular panel designed and manufactured in various sizes, tailor made to the customer’s specifications, saves space and time to implement. The ALKRO panel has an spike or structure to protect existing vault rooms or new independent vault rooms under construction. The panel is very strong and cannot be penetrated or removed by drilling, excavating, melting by welding equipment or pushing by a hydraulic jack. The arrow-like construction is revolutionary and unique for protected vault rooms and affords unmatched durability and provides the vault room walls the ability to withstand both pushing and explosion shock that is unavailable in other vault panels on the market today. This also applies to horizontal cutting attempts to create an opening in a panel or wall of the vault room. The unique construction has an international registered patent.