Used primarily on large die seams and breaking down sharp edges on machine parts. These stones are made to be held easily and are available in aluminum oxide or either silicon carbide (black or green).
| Part # | Grain Type | Grit | Color | Porosity | |
 |
ST-9-C-BOAT-28178 | S/C | 46 | Black | |
 |
ST-9-GC-BOAT-26875 | S/C | 46 | Green | |
 |
ST-9-P-BOAT-34459 | A/O | 60 | Pink | |
 |
ST-9-W-BOAT-32355 | A/O | 60 | White | Porous |
|
ST-9-P-BOAT-34461 | A/O | 80 | Pink | Porous |
|
ST-9-W-BOAT-32364 | A/O | 80 | White | |
 |
ST-9-WB-34342 | A/O | 100 | Blue | |
|
ST-9-P-BOAT-34202 | A/O | 120 | Pink |