A coarse 320 grit ceramic whetstone that can remove metal fast enough for light re-shaping on wide surfaces and fast enough to help remove small nicks and chips on edges. 

By adjusting the surface mud it can be made to cut coarser or finer; allow for the mud to dry a bit and it becomes a bit finer. Easier to finish from than the 220 but a bit slower for more significant work.

Brand: Tanaka Toishi 田中砥石工業所
Product Type: Whetstone
Grit: #320
Producing Area: Kyoto/ Japan
Soaking Requirement: 10-15 min
Size: 218 x 80 x 31mm
Weight: 1225g