Need some blanks for a Brinks deadbolt

[jimmyboy]

I recently lost a key to a Brinks deadbolt set .. just the normal one you can buy at Walmart .. how would I figure out which blanks to get and I could just decode the pins and cut a new one?

Thanks
Image links below

https://imgur.com/yWM6Xgt

https://imgur.com/iRfRKLw

[Squelchtone]

KW1 and you could decode and file a new key

[jimmyboy]

That is the strange thing .. the deadbolt lock says KW1 on the back and yet no KW1 key blanks fit .. it is something else

[billdeserthills]

That is the strange thing .. the deadbolt lock says KW1 on the back and yet no KW1 key blanks fit .. it is something else

Sometimes the nickel plating on the key is too thick, try a brass colored key blank