High speed stell cutter : It contains variety materials such as W18% , W6% , W9% ,W4% , and so on ! The user could choose different cutters according to the different material . They can highly improve your efficiency ! Alloy steel cutter : Alloy stell cutter is made of tool steel& 65m which can be mainly clarified into D2 , HLS , DS . It is usually used to equip wide range of wood working machinesand chip all kinds of soft solid wood !