The Invictus by Prometheus Design Werx features a bayonet style blade made from Bohler M390 steel. This butterfly knife's handles are made from bead blasted titanium. The lever lock on the bottom allows you to carry this balisong around without worrying about unintended deployment.
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This knife would have got 5 stars but the tang pins just fell out on the first day, not what i would expect for a $300 knife. Very disappointing. Other than that, it is an absolutely beautiful knife and if flips well.