The keys all work and I am satisfied with the product. Hayley, at replacement keys, was very helpful when I alerted the company that the keys had not been delivered despite Royal Mail's claim that they had recorded the delivery. The parcel from replacement keys was left in the letter box at the delivery address 9 days after Royal Mail claimed that they had delivered the parcel. We are not sure if this was by a Royal Mail employee or the person who had received the parcel in error. The signature and name on the delivery note emailed to me did not concord with anyone at the delivery address. Fortunately, there was no documentation linking the keys with my home address within the parcel but I had to endure nine days wondering who had the keys and if they could use them to gain access to my property.