Superior Steel SB180 Replacement Blade for 18-gauge Shear Cutter replaces Kett KIT102 Replaces:Kett KIT102. Kit includes 60-21(C), 60-22(L), 60-22(R) and 60-27. Hardness: 58-63 Rockwell DeWalt: 91970-00(C), 91969-00(L), 91967-00(R) Replacement Blade for 18 gauge Shear Cutter Material: Cr5MOV1