SEC-SD-993B-SS Please log in to see price or purchase this item Quantity discounts available QuantityPrice SKU: SEC-SD-993B-SS MANUFACTURER: Seco-Larm Product Details Electric shear lock. 1,500-lb Holding force. Fail-safe (door unlocks when power is lost) operation. 12 or 24 VDC Operation. Product Details Back Product DetailsElectric shear lock. 1,500-lb Holding force. Fail-safe (door unlocks when power is lost) operation. 12 or 24 VDC Operation.