3M - 7100243874 - 3M Flap Disc 769F 60plus Quick Change T29 4-1/2 in x 5/8 in-11

[This review was collected as part of a promotion.] Used to remove mill scale and grind a bunch of welds flush. These did the job quicker than the typical equivalent flap discs I'd pick up but left a significantly better surface finish and I felt like I had more control over how much I was removing. I could dig in and gouge into the metal or I could delicately remove high spots without anything ever grabbing or slipping up and taking a bite out of the base metal. Mostly, they left a really nice finish. I was just painting this project, but I'd have taken some 320 to grain the piece and been perfectly happy otherwise.