Dual Haken (ダブルハーケン, Daburuhaaken?), also known as GreatAxe, is a recurring weapon in the series. It is usually one of the more powerful axes in the games that it appears in, providing high attack power.
III Dual Haken is the second strongest axe in the 3D remakes, and the strongest in the NES version. It provides 122 Attack (75 in the NES version) and +3 Strength, and can be found in the Ancients' Maze or bought on the Invincible (NES version only). It can only be equipped by the Onion Knight, Viking, and Warrior.
XIV The Dual Haken is a level 50 axe for Marauders and Warriors obtained through handing Rowena's Tokens in at Revenant's Toll. It is item level 90 with a damage rating of 46, and grants Strength +21, Vitality +35, Parry +26, and Accuracy +37.
Dissidia012 Dual Haken is a level 90 axe that provides +65 Attack, -70 Bravery, and Wall Rush HP Damage +15%. It can be obtained from the shop by trading 182,800 gil, Rune Axe, Catoblepas Eye, and Stalwart's Dream x5.
The Double Harken (Double Sickle in the Force Five english dub) was the signature weapon of the mecha Grendizer in the anime UFO Robot Grendizer.