VEVOR Flap Discs 40 Grit, 4-1/2" x 7/8" Flap Discs for Angle Grinder, Type 29 Zirconia Flap Sanding Disc, Bevel Type Abrasive Grinding Wheels for Deburring, Rust Removal, Sanding, Finishing (10 Pack)

Based on the product information, these flap discs are compatible with most 4.5-inch and 5-inch angle grinders from popular brands like DEWALT, Milwaukee, Makita, and others, as they have a 7/8-inch arbor size.

The product description states that these flap discs are crafted from industrial-grade zirconia for exceptional strength and durability. Customers appreciate their heavy-duty construction and long lifespan, even when working on tough materials.

The product description doesn't mention anything about wear and tear. However, customers mostly say they have long lasting durability.

Yes, the product description states that these flap discs are suitable for grinding on flat, curved, bevelled or concave-convex surfaces.

I did not find any reviews that mention if residue is left behind.