... ,W5,W2) 1.Used in making all kinds of planner knife, 2.Flat, bars,heat treatment High speed steel(W18,W9 ... )Planer knife1.Main applicationUsed widly in making all kinds of knife, also for cold work moulds with high precision, long service ... 5.Steel grade: W18=T1 W6=M2 HSS for Making Knife(W18,W9,W6,W5,W2)