Titanium Knife Ring with M390 Mini BladeA ring can be more than a decoration, but is a useful tool. Z01 Knife ring is designed to be the handiest mini knife ever. No one can hardly notice it. Its like the normal ring, but when you press the mini flipper, the M390 mini blade comes out, and you can open the box easily before anyone can notice. Although its with a mini sized and compact design, it lacks nothing than characters. This is a little powerhouse of a mini folding knife & EDC ring.