The product is a vintage brass rib back saw made by the reputable brand Spear & Jackson. This original tool with 14 points per inch is a classic piece from the United Kingdom, perfect for woodworking and carpentry enthusiasts. The back saw is not a modified item, making it a valuable addition to any collector's tools and hardware collection. The Brass Spine is 9/32" thick. The Distance from the bottom of the spine to the teeth is 3-3/64".