The Buckle Guard Pro helps keep Children Safely buckled up while in a moving vehicle yet it is easy to undo by an older child or adult, simply, with one hand! It works on all seat belt buckles and also can help keep child and booster seats secure in a vehicle. The original Buckle Guard has been on the market for over a decade with a proven history for keeping children safely buckled up. The new Buckle Guard Pro is a redesign to fit the seat belts of today’s vehicles as well as the past with a contemporary new look. These fit most all kinds of car/van/bus buckles.