The Invictus by Prometheus Design Werx features a bayonet style blade made from Bohler M390 steel. This butterfly knife's handles are made from glow in the dark Hyper Glow Polymer. The lever lock on the bottom allows you to carry this balisong around without worrying about unintended deployment.
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There has absolutely zero slop or play in the handles and flips great. I love the glow in the dark scales as I'm a great big little kid. The only gripe is the fitment of the handle scales and the uneven screw head heights on the handles is kind of disappointing for what the knife cost. All in all, I like it though. Update, the handle scale where the clip attaches cracked when it was in my pocket so now the clip and most of that scale just flops around. This is unacceptable for a knife of this price. I've had cheap flea market knives last better; I'll avoid this brand in the future. Update 2: The manufacturer offered to fix the knife but Blade HQ went above and beyond taking it back. I really hope they can fix the design because this was an otherwise pretty good knife.