Incutex card punch puncher Schneider Dual SIM Cutter for iPhone MicroNanoWorld 5S 5C 4S 4 and iPad mini, Samsung Galaxy Note 2 3, S3, S4 Mini, S5, with 2 adapters + Pin, Silver (Electronics)
The punch is foolproof. Select correct slot (-> target size of the map), insert card into the right (well marked) and press it --- Finished. Who then throws away the wrong part, is your own fault :-).
