These blades fit most lawn mowers. It is an exclusive oregon fits all, The center hole fits 95% of all lawnmowers made. Each blade requires an adaptor kit (02-034 part#) unless being used to replace an MTD blade with the "Bow tie" (rectangular) center hole such as 742-0740, 742-0640, 742-0741, 742-0642, 742-0742, ETC.
Set of 9
21-3/4'' Length
Universal center hole
Oregon part# 518340
OEM part# can fit 95% of mowers and MTD mowers with the bow tie center hole