實心平面黑色碳化矽砂碟

I've been using these silicon carbide discs for finishing aluminum parts, and the consistent grit distribution has given me a much smoother surface than with my old sandpaper. The plain back adheres well to my hook-and-loop pad without lifting at the edges.

Finally, a disc that actually stays flat during use — the solid back on these makes a huge difference on my random orbital sander. Used the 220-grit for finishing some walnut and got a consistent scratch-free surface.

I was a bit worried about the grit consistency for my woodworking project, but these discs cut evenly and left a smooth finish without any deep scratches. The solid back really helps them stay flat on the pad, which made the job much easier than I expected.