Superior Steel SB180M Replacement Blade for 18-gauge Shear Cutter replaces Milwaukee 48-44-0150, 48-44-0160, 48-44-0170 Replaces Milwaukee 48-44-0150(C), 48-44-0160(L) and 48-44-0170(R) Hardness: 58-63 Rockwell Compatible with: Milwaukee: 6850-2, 6852-20 and 6850-4 Material: Cr5MOV1