Suitable for example:
MTD, Yardmachines, Yardman 18" (46 cm) working width mowers.
(the center hole of the blade fits in place of the original "star" center hole in the same chuck, the original "star hole" is patent protected).
(length 45.7 cm, center hole 23.6x17.8 mm, pin spacing 63 mm)
Replace the original numbers:
MTD 942-0738, 742-0738, 742-0738-637