Matched central spindle bore, blade clamping lug layout and bottom drive surface contour perfectly fit the output drive shaft of all compatible battery lawn cutting units. Solid forged thick hub structure delivers uniform clamping force to lock cutting blades firmly during high-speed rotation, eliminating blade wobble, offset cutting and loose blade risks when trimming thick turf and uneven ground. Reinforced outer edge wall resists impact from hidden rocks, tree roots and hard debris without cracking or deformation during daily yard mowing cycles.

Carries cross reference number 526921001 and directly replaces legacy part code 996256001, fully compatible with all listed battery walk-behind lawn cutting equipment variants. It serves as direct replacement for stripped splines, bent, cracked original blade mounting hubs to solve unstable blade rotation, uneven cut height and abnormal vibration faults. Single-piece integrated forming combines drive spline and blade clamping bracket as one unified component for one-step integral replacement without separate matching of loose blade fasteners.

Anti-rust surface treated metal construction slows oxidation and corrosion from long-term contact with lawn mud, damp soil and outdoor moisture. Standard uniform central shaft hole and lug spacing aligns precisely with equipment drive spindles and blade mounting holes, enabling direct bolt-on assembly during routine deck maintenance without hub reaming, shim spacer or blade bracket modification.