Item Description
An important tool in component processing. It has stable properties, and will never explode, powderize, or crack.Item Usage
A grindstone used to process weapon parts. Can be used for a variety of upgrades and for production in the Factory.Best Farming Areas
| Operation | Sanity per Drop | Fast/Value |
|---|---|---|
| 10-12 | 46.32 | Value |
| 3-3 | 46 | Fast |
Still Efficient At Lower Episode Progression
| Operation | Sanity per Drop |
|---|---|
| 7-17 | 65.54 |
| 4-8 | 61.89 |
Operations Item Drops From
| Stage Type | Mission | Sanity | Drop Rate | Sanity per Drop |
|---|---|---|---|---|
| Activity | GT-6r | 15 | ||
| Activity | GT-6 | 15 | ||
| Activity | TW-8 | 18 | ||
| Activity | TW-8r | 18 | ||
| Activity | BI-8 | 18 | ||
| Activity | OD-8 | 18 | ||
| Activity | LE-6 | 21 | ||
| Activity | AF-8 | 18 | ||
| Main | 3-3 | 15 | 32.61% | 46.0 |
| Main | 4-8 | 21 | 34.71% | 60.5 |
| Main | 5-7 | 21 | 34.60% | 60.7 |
| Main | 6-14 | 18 | ||
| Main | 7-17 | 21 | ||
| Main | 9-16 | 18 | ||
| Main | 10-12 | 21 |
| Stage Type | Mission | Sanity | Drop Rate | Sanity per Drop |
|---|---|---|---|---|
| Main | 3-8 | 18 | ||
| Main | 4-5 | 18 | ||
| Main | 4-8 | 21 | ||
| Main | 4-9 | 21 | ||
| Main | 5-4 | 18 | ||
| Main | 5-8 | 18 | ||
| Main | 6-2 | 18 | ||
| Main | 6-4 | 18 | ||
| Main | 6-10 | 18 | ||
| Main | 6-15 | 18 | ||
| Main | 7-2 | 18 | ||
| Main | 7-5 | 18 | ||
| Main | 7-9 | 21 | ||
| Main | 7-10 | 18 | ||
| Main | 7-14 | 18 | ||
| Main | R8-3 | 18 | ||
| Main | R8-9 | 18 | ||
| Main | R8-10 | 18 | ||
| Main | JT8-2 | 21 | ||
| Main | 9-2 | 18 | ||
| Main | 9-6 | 18 | ||
| Main | 9-7 | 18 | ||
| Main | 9-11 | 18 | ||
| Main | 9-12 | 18 | ||
| Main | 9-15 | 18 | ||
| Main | 9-19 | 21 | ||
| Main | 10-5 | 21 | ||
| Main | 10-9 | 21 | ||
| Main | 10-14 | 21 | ||
| Main | 10-15 | 24 | ||
| Sub | S4-2 | 18 | ||
| Sub | S4-5 | 18 | ||
| Sub | S4-8 | 18 | ||
| Sub | S5-7 | 18 | ||
| Main | S6-1 | 18 | ||
| Main | S6-4 | 18 |
