HSS for Making Knife(W18,W9,W6,W5,W2) 1.Used in making all kinds of planner knife, 2. ... , bars,heat treatment High speed steel(W18,W9,W6,W5,W2)Planer knife1.Main applicationUsed widly in making all kinds of ... W6=M2 HSS for Making Knife(W18,W9,W6,W5,W2)