Nylon 66 housing ensures 'tounchproof' satefy, Recessed screws and tubular contacts provide additional safety and help prevent short circuit. Integrated stainless steel spring wire protectors prevent twisting and breaking stranded wires during installation. Tubular contacts connect stripped solid or stranded un-terminated wire directly to each contact.  Modular design allows for connector to be cut into smaller sections or stacked end-to-end.