This is a very special and unique key code series. You can tell because the key blank used (pictured) is flat on one side with no grooving. Most keys have grooves on both sides. Information shows that this key code has been used for MMF, Alma file cabinets and desks, Invincible products and more. If in doubt, be sure to check the key way shown as a line drawing with the example key blank shown. This should match the milling of where you put the key in. SAVE15%! Order 2 keys and use the code LOSTAKEY during checkout in the redemption code box.