The Starrett 806D Thickness Gage Holder is a double-end tool designed for holding and measuring the thickness of various metal materials. Made by the reputable brand Starrett, this gage holder ensures precise measurements for inspection and quality control in metalworking and manufacturing processes. With its durable construction and reliable performance, the Starrett 806D Thickness Gage Holder is a valuable tool for businesses and industries requiring accurate measurements of metal thickness.