Parts list: № Number Qty Name Options 1 HXE53570 40 Knife Next page: ST752394 Knife, Cutterhead W/ 40 Knives, Grass ST752396 Knife, Cutterhead W/ 48 Knives, Grass ST752403 Knife, Cutterhead W/ 56 Knives, Grass ST918478 Guide Block Support, Sharpening Stone ST929411 Cutterhead Speed Sensor and Mounting Parts ST1036723 Cutterhead Assembly W/ 64 Knives, Non-Coated ST1036722 Cutterhead Assembly W/ 56 Knives, Non-Coated ST1036720 Cutterhead Assembly W/ 48 Knives, Non-Coated ST1036710 Mounting Parts, Cutterhead Position Sensor ST1036691 Cutterhead Assembly W/ 40 Knives, Coated