Boker 01BO051 Jim Wagner Part Serrated BLK. The Boker 01BO051 is another fantastic knife from the Jim Wagner collection. Features a 3 7/8 part serrated modified Tanto blade that is made out of 440C stainless steel. The blade also has a non reflective black coat, blood grooves (which lightens the weight of the blade) and a notched thumb rest which lets you grip the knife more firmly.