Drill Chuck Mandrel: Recording Din 238, Mk1 / B12. L: 89MM, I: 5MM. Drill Chuck Mandrel: Recording Din 238, Mk1 / B12 L: 89MM I: 5MM 5361-1-B12 Bison is a versatile industrial item that can be used in a variety of applications. It is a high-quality product that is perfect for use in manufacturing, automation, and other industrial settings. You can purchase this item at PLC2Day for all your industrial needs.