Curious kids try to get into anything and everything, but the Safety 1st OutSmart Slide Lock helps you keep them out with the first ever decoy button. Your child will think that the decoy button opens the lock, but pushing it has no effect. You’ll know that the flexible surface hides the actual secret to opening the lock. The OutSmart Slide Lock is designed to work with hardware up to 4.5″ apart and can be used on cabinets with large knobs or handle pulls. In side by side comparisons with leading competitors using real life toddlers, the Safety 1st Outsmart Slide 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.