EXACT FIT & OEM REPLACEMENT Directly replaces OEM parts 490-110-C188, 742-05620, 742-05620-X, 742P05620, and 742P05620-X. Precisely engineered for Cub Cadet 60 cutting decks, including Ultima Series ZT2-60, ZT3-60, and ZTS2-60 models. Please verify your mower deck size and the 6-point star center hole before ordering. HARDENED 10B38 STEEL & HRC 38-44 Forged from premium 10B38 heat-treated manganese steel, these blades achieve a Rockwell hardness of HRC 38-44. This structural integrity prevents bending or snapping when hitting small debris, providing significantly higher impact resistance than standard carbon steel blades. QUANTIFIED PRECISION SPECIFICATIONS Each blade is manufactured to a precision tolerance for optimal balance. Specifications: Length 20.550 , Width 2.330 , Thickness 0.160 . The optimized 0.160 thickness ensures high vacuum lift, effectively preventing the grass clumping issues common with thinner, low-quality alternatives. ENHANCED TOOTHED MULCHING PERFORMANCE The specialized toothed design increases airflow and creates finer grass clippings. Whether you are operating in dry or slightly damp conditions, the high-lift geometry ensures clean discharge or efficient mulching, returning vital nutrients to your lawn without leaving messy clumps. INSTALLATION SAFETY & KIT CONTENTS The package includes 3 mulching blades and 3 specialized nuts for a complete deck overhaul. Each blade features a corrosion-resistant black powder coating. We recommend checking your spindle condition during installation to ensure a secure 6-point star fitment for vibration-free operation.