3 of 5 keys were dead. 2 of them (with yellow holder) were unwritable, 1 (red) - totally unreadable. Discussion with seller was waste of time. For example, I was asked question "how do you use with the keys? this is writable key type, if inside is blank, you need to use writer to write a code into it before reading.". I think that it is clear that I know how to read and write information from and to keys because that two keys were OK. I think that this seller is very unfriendly and unhelpful. It was able to resend this cheap product with some chance at least 3 keys will work. But looks like that, for seller, it was cheaper to have long conversation and to have unhappy customer.