5 吋 鉤環藍色濕/乾研磨薄膜砂碟，10 件

I've been using these for knife sharpening and the waterproof film holds up perfectly even with plenty of water and metal swarf. The hook and loop backing keeps them firmly in place on my sander, no slip at all.

The hook and loop backing grabs my sander instantly with no slipping, and the waterproof film held up great during wet sharpening without curling at the edges. My scissors and knife came off the disc with a noticeably cleaner edge after just a few passes.

Switched from using standard sanding discs to these waterproof films for knife sharpening—the 800 grit cut cleanly without loading up like wet/dry paper used to. They held up through several passes on a damp stone, and the hook-and-loop backing stayed firmly in place the whole time.