Boker Plus Kwaiken Automatic Knife Black. The 100-percent American-made Kwaiken Automatic combines the slim, minimalistic Kwaiken design with the perfect automatic mechanism It has a 3 1/2” 154CM steel blade with a stonewashed finish and it can be quickly deployed with the push button It has a black, CNC-milled aluminum handle with a push button lock and a tip-up pocket clip for ease of carry