MTS Universal Interlock Pakistan Make your changeover safe and simple with the  MTS Universal Interlock.  No back‑feed, no accidental paralleling of mains, generator, inverter or solar. Clip it on a 35 mm DIN rail board, add the included slider and screw, and you’re ready in minutes. The MTS fits most 18 mm modular breakers used in Pakistan. It works with 2‑pole or 4‑pole arrangements, and can be adjusted to match different toggle heights and spacings. The robust ABS housing and zinc‑plated steel latch deliver long life in homes, shops and small industry. No rewiring of internal breaker parts is required. Features of  MTS Universal Interlock Pakistan: Converts two MCBs into a safe manual transfer switch Universal fit for most 18 mm modular MCBs/isolators Positive mechanical lock prevents simultaneous ON Rugged ABS body with zinc‑plated steel mechanism Quick DIN‑rail install; adjustable spacing and height Specifications: Type: Mechanical interlock kit for MCB/isolator pair Compatibility: 2‑pole or 4‑pole, standard 18 mm modules Mounting: 35 mm DIN‑rail; adjustable clamp/screw Materials: Flame‑retardant ABS + zinc‑plated steel Function: Prevents back‑feed; single‑source selection Uses: Mains ↔ Generator changeover Inverter/UPS ↔ Utility transfer Solar hybrid bypass/maintenance Shop, home and small‑industry DBs Temporary manual transfer in panels