The 039971910 is a 10-pole assembled jumper bar, type BJMI10, used for creating electrical connections between adjacent M 10/10 series screw clamp terminal blocks. It is rated for a current of 57 A and features IP20 protection, ensuring touch-safe operation once installed. This jumper bar simplifies the process of commoning or bridging multiple terminal blocks, eliminating the need for individual wire jumpers. Its design ensures a reliable and quick distribution of potentials, making it ideal for use in control panels and distribution cabinets.