ONE BOX OF 6 pairs FOR £15 BARGAIN + POST MORE AVAILABLE 102mm x 75mm The Arrone Security Door Hinges with Dog Bolts are high-grade, polished stainless steel ball bearing hinges suitable for security doors. The set of nine silver-coloured hinges feature Grade 13 construction, ensuring durability and strength for added security in your home or business. The dog bolts provide additional protection against forced entry, making these hinges a reliable choice for enhancing the safety of your property.