Improved Knuckle Duster

Following my previous post on shortcomings of the most common design of Knuckle Duster it was inevitable that I might amuse myself trying to improve on the design.
I learnt last night that knuckle dusters are legal in France, but require the user to hold a licence, which seems reasonable. Since in most parts of the world they are still illegal my improved design will probably remain a theoretical exercise in engineering and stay only pixels. For those that are interested, here is my first attempt, knocked out in about ten minutes.

The two finger hole design may be a little quicker to put on and more forgiving on varying hand sizes or wearing gloves. Several variants are possible on this basic design, with four oval finger holes or more rounded points.