handles 3000 grit diamond stones and blank glass platens. (2ea) The 3000 grit diamond stone is the finest diamond stone offered by , and it produces truly spectacular edges. The glass is for use with any Lapping Film. We recommend paring a 3 micron lapping film with the 3000 grit stone. This stones pack is compatible with all sharpener models. Sharpen both sides of the knife simultaneously, providing faster, sharper, and more durable results Compatible with all models Monocrystalline Diamonds provide longest lasting abrassive available Glass Platens allow for easy placement and removal of Diamond Lapping Films Perfect for providing razor sharp edges and a highly polished finish