If you're used to HF's incredibly cheap (bidirectional) cutting discs, you'll be surprised. They are much more break-resistant than cheap ones; This is important for you if you are tired of being hit by cheap wheels flying sideways. They're also twice as thick, but still work better as a cut-off than as a grinder. They are slightly convex, which together with the increased thickness makes the wheel stiffer. They're pretty rough, so good luck smoothing out cuts on the fly.
KSEIBI 4 1/2" Zirconia Corundum Flap Discs | Grit #60, 10Pack | Sanding & Grinding Wheels
9 Review
KSEIBI 686012 4 1/2 Inch Flap Disc 80 Grit Aluminum Oxide 10 Pack Auto Body Sanding Grinding Wheel.
18 Review
Sunjoyco 4-Inch Diamond Cup Grinding Wheel - 12-Segment Heavy Duty Turbo Row Disc For Concrete, Granite, Stone, Marble, Masonry And More
15 Review
Get A Perfectly Smooth Finish With SUNJOYCO 4" Heavy Duty Turbo Row Diamond Cup Grinding Wheel For Stone, Masonry, And Concrete
12 Review