The anti-theft shopping cart coin lock or trolley lock is the simplest, most affordable and efficient method to ensure the return of your shopping carts or trolleys and avoid injuries compare to anti-theft lock wheels. HOW DOES IT WORK? An anti-theft shopping cart coin lock is installed on each shopping cart or trolley. To unlock a shopping cart or a trolley, the customer simply inserts a coin* or a specially designed PVC token into the slot of the shopping cart or trolley lock. The key can then be removed to separate the cart or trolley from the others shopping cart or trolley, the customer is then free to use the shopping cart or the trolley. To return the shopping cart or trolley, the customer inserts the key of another shopping cart or trolley which is in front into the anti-theft lock of the shopping cart or trolley, retrieves the coin or PVC token and the shopping cart is locked automatically avoiding it to be stollen. Therefore, the service to use the shopping cart or troley is FREE for your customers. Your store image is important. An orderly parking lot with properly stored and accessible carts or trolleys increases the positive image of your store and helps to keep your parking lot clean and safe and avoid receving complaint about shopping cart scratching cars or other incidents. You can also provide your customers with a specially designed key ring and PVC token with your store name and logo. These are great promotion tools for your store. Your customers will think about you each time they use their car keys to go to the grocerie stores.