These are hand made from Cambridge Gault clay and as such may exhibit variations associated with traditional handmade product. All our tiles are soaked once drawn from the kiln in order to neutralise any problems relating to fossil blow which can occur if fossil is present within the clay, and are a feature of traditional tiles within the area. Peg tiles have holes made by hand and are not uniform, they should be hung with aluminium or copper nails or traditional pegs.