The Complete Magnetic Locking System by Safety 1st helps to keep your curious crawler from accessing off-limit cabinets and drawers. These ingenious locks install easily inside of your cabinets and drawers, making them invisible to visitors passing through the area. They open with a magnetic key that can be stored high up and out of your child's reach. For periods of non-use, when parents are busy in the kitchen or bathroom, they can be easily disengaged. When you're ready to keep things shut again, the SecureTech locking indicator lets you know that the lock is properly engaged. This standard set includes four locks and one key.