Security Door Controls SDC 1571 EMLock Magnetic Lock, Surface Mount, Single, 1200lbs JMAC# SDC-1571 SDCs patented EMLock design represents the pinnacle of magnetic lock evolution. The modular EMLock assembly makes them easy to stock, install, upgrade and maintain.SDC 1571 series Single EMLocks include a lifetime warranty and has a 1200 lb holding force... MSRP: Was: Now: $300.97 Add to Cart