The Multi-Purpose Appliance Lock is ideal for the freezer refrigerator microwave and dishwasher. This strap attaches easily to your appliance and helps keep children from opening them. In side by side comparisons with leading competitors using real life toddlers the Safety 1st Multi-Purpose Appliance Lock was strong enough to keep even the cleverest of toddlers out. Even in lab testing using state of the art mechanical pull force equipment Safety 1st outperformed the competition. Toddler Tested. Proven Stronger. NOTE: not for use on oven doors. Safety 1st believes parenting should have fewer worries and more joyful moments. As the first and only leader in child safety Safety 1st is here to give you peace of mind so you can spend less time worrying and more time enjoying every first you experience with your child.