Hollow ground bevel is?

Hollow ground (concave) bevel: Used when  cusp required to cover with cast metal Prepared with 12 fluted round ended bur Provide sufficient bulk of restoration at cavosurface margin It is an exaggerated chamfer basically Also known as concave bevel In posterior ceramic restorations at cavosurface angle hollow-ground chamfer confined to the marginal enamel will aid in developing a more effective seal