Modified To Work using Only One Key, No Guard Key Required. Guard KeyHole Not Used. Why buy a Lock and Not be able to use it because No Guard Key is Provided. Can be used to replace a similar Mosler or Diebold Locks, similar to 586A and M5700. Ilco Series 570000 Safe deposit box lock W/ 2 Keys, and with mounting Screws. Includes Free USPS Ground Advantage Shipping. If you Need more than 1, text me... NewKenFrank

       Also, I do sell larger quantities of safety deposit locks with two keys and a guard key matching for all of them. Any Questions, message me... NewKenFrank