The Black Diamond is Edge of Belgravia's unique knife block.Christian Bird’s design is faithful to our avant-garde aesthetic, bringing together innovative design and supreme utility. Designed for maximum flexibility, Black Diamond is suitable for most knives with blade of up to 4mm wide. Tightly packed, it can fit up to 11 knives alternated but is best for 6. WE RECOMMEND ONLY TO USE EDGE OF BELGRAVIA KNIVES - OTHER BRANDS MAY NOT FIT.