This high quality, 30cm magnetic knife rack is made of black granite and will easily hold 8 knives. The simple and elegant design conceals the magnets within the block with no visible splits or external screws on show. The sleek and timeless look is also easy to clean. Lastly, this product is super strong neodymium magnets engineered to give a constant and secure hold with no dead spots across the board. Full attachment hardware included for insulation to brick, plasterboard or wood so you can install easily and securely.