I have two plastic cases from the manufacturer for storing and transporting my drill and tool kit. Locks have worn out over many years of use. I've tried various methods of keeping suitcases closed, including velcro. Nothing seemed to work well. Until I saw these suitcase locks. I was able to screw them into existing cases with a few 3/4" rotary screws and the cases are better than new. No more loose parts falling out of gaps around the case. Problem solved.