Shapton Diamond Glass Lapping Plate - DGLP Wusthof Classic Some of the ferrules are

Some of the ferrules are black as in the photo

it is generally flat and it's fine to use either side for sharpening (stick to using that one side though once you start)

Shapton # 60117

do NOT purchase this knife

Use the santoku for cutting

Shapton Diamond Glass Lapping Plate - DGLP Wusthof Classic Some of the ferrules areThe Shapton DGLP Diamond Glass Lapping Plate is famous around the world, and for good reason. It's not cheap, but it strives for perfection and performance unlike any other diamond lapping plate on the market. The performance is amazing and it is known to be as perfectly flat as is possible. Read the Shapton FAQ instructions. This DGLP is capable of lapping stones up to 30 microns (approx. 500 grit or above). It should not be used on rougher stones,