Cytech™ Custom Cyberhand

Hand Blade, Retractable: The hand blade slips out of the side of the hand, opposite the thumb, parallel to the hand. This dandy little weapon can make a punch pretty nasty. The side of the blade closest to your own hand has no sharp edge, so you can't cut yourself by accident. You can also get the hand blade implanted in a normal hand, but the hand side edge tends to bruise flesh if you strike out sideways and hit something too hard. That's no problem for blades in a cyberhand, of course.