Handle Flex Lock from Safety First is a very easy to install and use home safety essential that keeps children from opening cabinets. The SecureTech® visual indicator guarantees that the device has been correctly locked. Adjustable pins means it fits any kind of cupboards. The lock has a quick release double action and can be used with any type of doors, both with handles or doorknobs. Stays on door knobs/handles when open. 2 colors to fit all contemporary interiors.