Check the listing for details. Store front locks SAVE MONEY.change your own locks. Condition: New. Listed at 44.95 USD. Change your own locks!!!! $$ Save Money $$.Once you install these, you will not ever need any tools to change your locks again !!!!.Each set comes with a mortise housing which is permanently installed and a core to operate the lockPLUS a second core, so when you have a change in personal, or a lost or stolen key, you merely swap out the cores.You can send the core(s) back to me which I can rekey them and mail them back to you for the next time.you will get 2 keys for each core and 2 core removal keys regardless how many cores you purchase..you will need a set for every lock cylinder you currently have. If your door has a knob, lever or push paddle, you will need 1 set HOWEVER if your door has a key cylinder on the inside you will need 2 sets. Make sure your locks looks like the samples in the last 2 pictures. If they don't look like the samples, i can't guarantee the will work..If you need extra keys, let me know before paying invoice, I can cut extra keys for you ($3 each).if you have multiple locations and you want locks for all your locations and master keyed, contact me.