Check the listing for details. SDC 1511T Slave Exit Check W/ Integrated Delayed Electromagnetic Lock NEW. Condition: New. Listed at 355.00 USD. The SDC 1511T Slave Exit Check with Integrated Delayed Electromagnetic Lock is a high-quality access control equipment suitable for double doors. With a holding force of more than 1000 lb, this unit provides secure locking for your facility. The 12V power supply ensures reliable operation, making it an essential component for business and industrial settings. The SDC brand is known for producing durable and efficient locking systems, making this unit a reliable choice for your security needs.United States Shipping prices only for the lower 48 States, excluding Hawaii & Alaska. If you need an item shipped to Alaska or Hawaii please reach out to us for a shipping quote. We will cancel any orders from these two states if prior shipping quote has not been requested.