Naniwa Silicon Carbide Powder Grit:Fine 180 Grit The large side features a

The large side features a 3/4" diameter and the small side features a 3/8" diameter

Balance rotational objects with a center hole of 5/16" to 1-1/2" diameter (lawn mower blades

240 grit / 65 micron

If you sharpen with water stones

220 and 320 grit Ceramic Water Stones on the Naoru Cast Iron Lapping System

Naniwa Silicon Carbide Powder Grit:Fine 180 Grit The large side features aFor Extra Flattening Power Sometimes you need just a little more aggressiveness in your abrasive when flattening a water stone. If a water stone develops a deep scratch or blemish, it can take a great deal of effort to work it out on a flattening stone. That's where the Naniwa Silicon Carbide Powder comes in. Sprinkle some abrasive powder on your flattening stone before use. The extra grit will enhance the flattening stone's cutting power and remove