Derwent Sandpappersblock.

Citat från tillverkaren

" Ideal for creating an angle on your pencils

If you want to create an angle on your pencil point or drawing stick, this block of ultra fine sandpaper is the easy way to do it. Simply rub the point or stick across the top layer of sandpaper to create a smooth, even finish at the exact angle required. This technique can also be used to drop pigment onto a wetted area of artwork, especially good for creating sand or stone effects. "