This listing is for a quantity of two (2) #1393 high quality solid brass replacement keys, for home security systems or burglar alarm systems made by Ademco, ADT, DSC, First Alert, Honeywell, and Ranger American. They also replace keys numbered 506. Your satisfaction is guaranteed. All items are shipped via the US Post Office (USPS). I make every effort to ship your item within 24 hours following receipt of payment, except for Sundays or Holidays when the post office is closed. Payments are accepted by Paypal.