Sanding down wood and metal: a guide to sanding Bosch DIY
Grit refers to how coarse or fine a piece of sanding paper is. Generally speaking, the higher the grit, the finer the sanding paper and the finer the end result will be. Grit tends to be divided into sizes that are 20 to 30 points apart, so the next size up from 60 grit would be around 80 grit, for example.
