... forging,casting,grinding and heat treatment,Each blade can meet your requirement.Meanwhile,all of blade materials are spring steel 65Mn,SUP6 ... , 2 , 21/4 , 21/244/51/57/63215353.5/4.521/263225603.5/4/5/621/2 , 23/4 , 3 , 31/463/70 ... /76/83235853.5/4/5/631/4 , 31/283/89246103.5/4/5/63 , 33/16 , 31/4 , 31 ... /2 , 33/476/81/83/89/95266605/5.5/6/7/833/8 , 31/2 , 4 , 41/4 , 41 ...