The Twin Nails are Dual Sword type weapons.
Monster Hunter Freedom Unite
|Upgraded From||>>||Twin Nails||>>||Upgraded Into|
|Steel Ice Dagger+||Twin Nails+|
|MHF2 and MHFU: Sword and Shield / Dual Sword Tree|
- Good Dual Swords for the end of low rank and are even useful one some high rank quests. It's final upgrade is probably one of the best Dual Swords in MHFU.