The Square D 2934-D38 Roller Lever Arm B1 is a unit quantity of 11 limit switch accessories designed for industrial automation and motion control systems. Manufactured by Square D, a reputable brand in the PLC processors and HMI industry, these roller lever arm units are essential components for precise and reliable motion control in various industrial settings. With the Square D 2934-D38 Roller Lever Arm B1, users can ensure accurate and efficient operation of their limit switches, ultimately improving the performance of their automation systems.