Knife is never safe. Even in kitchens where each knife has their own positions, it is still quite possible that they will go out of the slots and fall onto the floor or your feet. Luckily the Knife Locker by Min Seong Kim will cleverly solve that problem.
A knife will be locked into position when you turn it by 90 degree clockwise. And after that, a UV sterilization process will be started to make your knives more secure for use.