For Replacement blade set for 18-gauge Shear Cutter. Each blade is replaceable separately, but it is recommended to change all three at the same time for maximum sharpness. Replaces Milwaukee center blade (48-44-0150(C)), a left blade (48-44-0160(L)) and a right blade (48-44-0170(R)). Product Specifications: Cr5MOV1 Material: 58-63 Rockwell Hardness: 48-44-0150, 48-44-0160 Compatible with: 6850-2, 6852-20, 6850-4 Milwaukee: Manufacturer look and details may vary