I use these type of lock to keep knife and silverware , and other dangerous kitchen utensil and tool out of the hand of my special need son . I have previously use the Tot Locks , which work great , but due to the difficulty in install they decide to give these a try . and they work like a charm : -rrb- my son be very mechanically inclined , unfortunately , and if he could see the lock he would be able to figure it out in no time flat . but because of these be design the cabinet or drawer only open about 1\/2 '' and there be nothing for he to push on to open it . and installation be very simple . I love that I do not have to drill the hole for the release .