After burning through countless grinding wheels on my angle grinder, this 20-pack of flap discs became my go-to for everything from smoothing welds to resurrecting rusty tools. The aluminum oxide abrasive bites aggressively yet leaves a surprisingly even finish – way less gouging than traditional grinding wheels.

I blasted through paint on an old trailer hitch with the 40-grit (felt like a hot knife through butter), then switched to 120-grit for feathering edges before repainting. The fiberglass backing held up when I accidentally tilted the grinder sideways, though hitting a hidden nail did claim one disc prematurely.

Where these really shine? Quick wood projects. Stripping decades of gunk off barn wood beams left minimal swirl marks compared to belt sanders. Just keep moving – lingering creates divots. At ~$2/disc, I don’t baby them like my $15 specialty discs, yet they’ve outlasted some brand-name options.

Two quirks: The arbor nut requires a wrench (no quick-change feature), and cordless grinders drain batteries fast with heavy use. But for garage tinkerers or weekend warriors, this variety pack covers 90% of grinding needs without breaking the bank.