I purchased this set because I noticed a little bit of wobble in my blade as I shut down the machine even though the blade is tight against the arbor.  I had some doubt as to how much effect stabilizer would have on the blades performance.  My package noted that these were two sets.  I gave the other one to a woodworking buddy.  I am completely satisfied and impressed with this stabilizer. It completely eliminated the blade wobble at start up and shut down of my saw.  I had one thing that abolutely puzzled me.  I installed the stabilizer on the outside of the blade on my right tilt saw.  There should have been no change in the blade placement.  My zero clearance insert would not go over the blade.  It rubbed probably a 1/64th of an inch or so.  I lowered the blade all the way down, put in the insert and powered up my saw.  I then raised the blade.  It cut the expected 1/64th of an inch or so and I let it run a minute to clear out the insert.  I was amazed at how well the stabilizer worked.  No more wobble.  I own a Delta contractor saw with cast iron extensions and tons of add ons.  I am completely sold on this product.  I am certain that my old arbor flange was slightly warped, although I never noticed it.  I highly recommend this product and it is so inexpensive.