MOTHER & HOST PCB DESIGN: Our Pioneering Dual PCB special design eliminates the need for any tool to be used in order to replace a faulty interlocking system. The dual PCB design consists of a Mother Board PCB on which all components are mounted & Host PCB which has connectors connecting all the wires to the constituents such as the lock etc.  Incase of a fault occurring simply the Mother PCB can be pulled out and replaced with a new one within 5 seconds without using any tools, or touching any wires.