Sandpaper coarseness is determined by the size of grit on the paper—ranging from extra-coarse to extra-fine. Using sandpaper that's too coarse could damage the material you're working with.

Grit measures sandpaper’s coarseness, determined by the size of the abrasive particles on its surface. A coarse grit wears down whatever you’re sanding more quickly, but it also leaves deep ...

The grit numbers refer to the size of the particles that are doing the sanding. The lower the number the coarser the grit. A sandpaper that is 60 grit might have particles on it the size of table ...

Will sanding your grip act as a temporary band-aid? What I found was fine-grit sandpaper (100 grit and above) used gently can help roughen up the surface and lend more traction. But the fix was ...