If you are already familiar with how great key cards are, multiply the effect by using 2-piece key cards. The principle is the same as in the case of primary and additional bank cards so you get a modern and smart key card which has a breakable piece you can give to someone else. Therefore, if your client hands the other card piece to a family member, you’ll double the number of customers, increase the revenue, and remember: a satisfied customer is a repeat customer!