Its a new invention created by Prime Packaging where bottom lock is done automatically. We generally assumed that our packaging boxes should packed very fast to save labour cost and time keeping that in mind our r & d team has designed these auto lock boxes in transparent material ( PVC & PET ) our research team has done trial where regular boxes takes 20 seconds to assembled where as our Auto lock boxes just takes 5 seconds which is a great time saver. Auto lock boxes looks more attractive with offset printing