Enhance the functionality of your Cutler-Hammer contactors with this mechanical interlock frame accessory. Designed for reliable operation, it ensures proper sequencing and safety in your electrical control systems..This is a mechanical interlock frame accessory for Cutler-Hammer contactors. It is designed to provide mechanical interlocking between contactors, preventing simultaneous engagement and ensuring safe operation. The frame is a component of the XTCEXMLM product.