The 9.5mm ball profile is ideal for working on curved surfaces, rounded recesses, concave areas, small cavities and shaped details where flat or pointed grinding stones may not give the right contact.

Designed for use with a compatible mini rotary tool, these chrome corundum grinding stones are useful for sharpening, removing sharp edges, cleaning small metal areas, refining contours in glass or stone and removing rust, weld spatter or surface coating.