This design was created out of necessity. My stepfather owns an engineering works and at night the local yobs keep coming in and pushing soil into the ignition keyholes on the forklifts. Until we can get the claymore mines and sentry guns set up (for you, in case you're reading this) these will have to do. They're designed to be a lockable switch cover which clicks closed. All you will need to make this work is a small metal bar approximately 20mm x 2mm to form the hinge (I was originally going to make a 3D printed hinge but this would be weaker and more vulnerable to attack than a metal one) and of course a small padlock. If you need similar protective covers made please contact me and we can discuss your needs.