Two Finger Knuckle Duster DFK 03 Ti Sandblasted

Dimensions:
Material - Titanium
Finish - Sandblasted
Height - 2 13/64" (56 mm)
Width - 2 13/32" (61 mm)
Thickness - 43/64" (17 mm)
Finger hole diameter - 1" (25 mm)
Weight - 5 oz. / 140 grams

More similar products you can find here:
real titanium knuckle dusters 2 finger price in the USA

Special holes allow you to use this product as a keychain. 
You can also thread a paracord (550-type) lanyard through the holes.
Nice gift for Her.

EDCCraftStore.com official website is the best place to buy original EDC-products at manufacturer's price.