Precision and durable compass/divider, Designed for : Woodworking Metalworking Leather working Other drawing work Finely threaded, to achieve fine adjustment. When used as a divider, it is frequently used with precision ruler to achieve accurate measurement transfer. Rivet design to increase stability. Made of high quality carbon steel, good toughness, high hardness, sturdy and durable, wear-resistant. Hard and sharp tips can accurately mark the workpiece.