Review on Optimized Safety: High Door Lock by Safety 1st by Alexis Brown

Ideal for homes with cats! Our litter box is in the basement so we want our cat to have access but not always our children (especially crawling babies) and this works perfectly. You really have to think through your setup (and make sure everything is hooked up properly before you start drilling, so it's best to have 4 hands and 2 brains for this), but we've got this on a few different doors and we made sure it works you. Be careful - make sure you line things up so you can close the door all the way if you want.