This product fit our bathroom cabinet door knobs well. It has always been a little stiff to open, but it was manageable. The reason for the low rating is because one half of the lock fell apart when my 20-month old lightly tugged at one of the plastic strips (the lock was not "engaged" at the time). We had only been using this lock for 3 months - unlocking/locking the lock twice a week - when this happened. We will not buy this lock again.