Ok here is a new on on me... got a new set of blades for my Kodiak 5 foot brush hog... without giving it a second thought, pulled off the old blades and installed new one. Went to cut and they did NOt cut. Compared the new with the old and the new blade had the sharpened side just the opposite of what i have been using for 100 years. In other words, i had clockwise blades instead of counter clockwise. Never ran into this issue before. Anyone out there with comments about this ??? thanks.