This is my first post, so be kind . I did try to "search" but I wasn't having any luck (wasn't really sure what to search for (in this case). I do believeing in supporting my local Exmark dealer, but items like blades seem to be alot cheaper "on line". I can find blades all day long for Exmarks with 5/8" center holes, but as far as I know, mine takes .630 (off hand I don't know how much difference that is...been a long day) I mean the part #'s they show in my manual are different than all the one's I see on line(except the 323515.....and I'm trying to get something alittle more heavy duty than those) Did the center hole sizes change with the maint. free spindles? [did see alot of previous post on places to order on line.....but still haven't seen 1 that has my blades where I'm able to "add to cart" ....Hope these questions arent too stupid. [Exmark Metro HP 48"...16.25"] Thanks all!