If you are looking for a safe storage solution for your NeoSaveMasta memory card for your Neo Geo, look no further! The NeoSaveKeepa was specifically designed to securely hold the M in place. The NeoSaveKeepa is ONLY compatible with NeoSaveMasta memory cards from 2016 and newer. The older memory cards will not fit due to their size. Features magnets in each corner to keep the two halves closed and has a stainless steel hinge pin for durability. Uses 4 x 5mm x 1mm magnets: 1.59mm Steel pin: You will need a finely tuned printer to be able to print these and have the magnets fit in the holes for them. Also, you can use a 1/16th drill bit to ream out the hinge pin hole some to make it easier to slide in the steel hinge pin. The steel pin needs to be but to 80mm for the hinge. I have include a 3d printable jig to measure and cut the pin at 80mm. If you don't have the ability to print this off, I sell them at my online shop: