The 442-04444A 23.55" high-lift blades 2-pack is a precision-manufactured replacement part that directly replaces 442-04990A,442-04990 and 442-04444, featuring a direct-fit design with S center hole that enables seamless installation without modifications for 66" cutting deck models including LTX-1042, LTX-1055, LTX-1066, LTX-1066M, RZT-L66, RZT-L66 Fab, RZT-LX66 Fab, RZT-S66, RZT-S66 Fab, RZT-SX66 EFI Fab, RZT-SX66 Fab, XT1-LT66, XT1-LT66 EFI Fab, XT1-LT66 Fab, XT2-LX66, XT2-LX66 EFI Fab, XT2-LX66 Fab, XT2-LX66 LE Fab, Z-Force S66, ZT1-66, ZT1-66 Fab lawn mower units. Constructed with premium heavy-duty steel and precision sharpened edges paired with a high-lift profile, this 2-pack delivers consistent clean cuts, enhanced grass clipping evacuation for efficient bagging/discharge, and resistance to wear, bending and dulling; its anti-rust coated finish protects against outdoor moisture and debris to extend service life, while the S center hole ensures exact dimensional matching for secure mounting and balanced rotation on 66" decks (2 blades required for full replacement). Built to meet strict OEM specifications, it is recommended to refer to the original equipment owner's manual to confirm proper fit and installation guidelines for your specific machine, including torque settings and blade orientation for safe and optimal operation.