HSS for Making Knife(W18,W9,W6,W5,W2) 1.Used in making all kinds of planner knife, 2.Flat, ... )Planer knife1.Main applicationUsed widly in making all kinds of knife, also for cold work moulds with high precision, ... long service life requirements, such as punching die, cold extruding ... 5.Steel grade: W18=T1 W6=M2 HSS for Making Knife(W18,W9,W6,W5,W2)