... of PCB 2.Material: Tungsten 3.Specifications:Stronger Hardness, Abrasion Resistant,Corrosion Resistant Specifications:1.PCB End Mill,materils is solid carbide tungsten2 ... wood,carbon fiber,fiber glass,HDF composite board3.Stronger Hardness, Abrasion Resistant,Corrosion Resistant4.higher hardness,higher wear resistance,higher toughness,better ...