Parents of curious toddlers, this door lever lock is an absolute must-have! It installs in seconds without any tools - just position it over the lever and the strong adhesive keeps it securely in place. The design is clever because it allows adults to easily open the door while preventing little hands from figuring it out. I've used these throughout my house - on bathroom doors, basement doors, closet doors - anywhere I don't want my toddler exploring unsupervised. The plastic is durable enough to withstand pulling and pushing from determined little ones. What I appreciate is that it doesn't damage the door hardware at all - when you're done with childproofing, it removes cleanly. The universal fit works with most lever-style handles, which is convenient. It's given me so much peace of mind knowing my curious two-year-old can't get into places he shouldn't. The white color blends nicely with most door hardware too. Seriously, if you have a toddler who's starting to explore doors, this simple device is worth its weight in gold for the safety and peace of mind it provides!