Drop safe fire king - $300 (Manteca)

I have a nice drop safe time delay heavy duty business industrial , I have generic codes to open doors but not the manager code to change the codes I’m sure you can get them from company or put new dials or keypads it’s easy to do 50$ on eBay each this safe is a 1500-2000$ safe from a closed down business , front door is 1/2” or so thick fire rated and burglary rated drop safe