The Axe

 is a Hamaxe that looks very much like a guitar. This Hamaxe is the strongest hammer as of 1.2.

When swinging the axe it plays an electric guitar sound effect.

This is also a very strong weapon and will continue to attack as long as you hold down the attack button.

It is a rare drop from Plantera, a Hard Mode Boss in the Underground Jungle.

The Axe is potentially one of the most powerful melee weapons in the game.

Trivia

 * This item is a reference to Plantera's name origin, Pantera, a groove metal band.