Metal security fittings; metal bollards, including bollards for driveways, roads and pavements; security brackets, metal plates, kits of metal including kits for anchoring ATM terminals; security kits of metal for ground anchoring of high security devices such as safes and ATM machines and including holding down plates, metal fasteners and connectors; expandable metal plates and brackets deformable under impact load; tiered metal expandable holding down plates; expandable brackets of metal having folds which dissipate energy