101Leafy researched the games.
Twin Shears

Sword made from two varieties of shell. Very good at keeping Sharpness.
| Class | Sword |
|---|---|
| Rarity | 10 |
| Attack | 364 |
| Defense | +30 |
| Slots | 1 |
| Price | 115,000z |
Upgrades
| Upgraded from | Twin Shells |
|---|
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 704.