Review on 💯 High-Quality Flap Discs 20 PCS 4.5 Inch - 40 Grit Grinding Discs, Assorted Sanding Grinding Wheels with Aluminum Oxide Abrasives - Grinder disc for Optimal Results by Jason Morrison

I use a lot of Petal Discs so I decided to try these special Revain Discs. I was pleasantly surprised in almost every way. This is one of those rare occasions when you get more than you pay for. At $0.99 each they are absolutely no problem, tremendous value indeed. Benefits: The shaft bore is the right size and sits right in the middle of the disc. (It's a parody that this should even be a positive thing, but I've used too many discs with a sloppy mandrel interface and it was a real pita to center them so they don't vibrate.) They both slice up really well the bottom and around the edge. They are not very easy to paint (even when grinding hot metal). long service. This is mainly because the cloth to which the sanding material is glued will tear over time as it wears away, revealing the fresh sandpaper underneath. This is a problem I've had with more expensive drives [Norton, Dewalt]. They will rebuild almost to the point where the abrasive has worn away, but the fabric will not peel away to reveal the fresh abrasive underneath. It just gets some kind of coat of varnish on it and then it doesn't work effectively anymore. Cons: They aren't individually labeled, so you'll need to exercise your due diligence to keep track of their firmness. I keep each grit in my own Rubbermaid and use a colored pencil and mark the grit on it when I take it out of the box.