They are, but they aren't. The reason why I say this is there are some limitations when it comes to these blades. The 2008 models and older are going to have a different setup and fit differently. Another difference is if you have a fabricated (welded) deck instead of a stamped deck. The blades would be different. From what you are describing about your mower, it sounds like it is a YTH22V42, if this is the case and it is a 2009 or newer, then you should be able to use the Gator Blades model 596-900 with your mower. I would suggest taking a look at the part number on the serial tag sticker under your seat and let us know what that is and we can confirm, but as I said it does sound like you own a YTH22V42 and if this is the case, these will fit if it is a 2009 or newer.