The device is odd in appearance, having a cylindrical body with a large face on one side. One arm is a pointed hammer while the other is something like a shield.
It was first mentioned in chapter 53.
The Monster proves to be ineffective against the Biscuit Hammer, as it was almost completely smashed with one hit. Later, the pieces of the monster were turned into a giant rock version of Samidare which smashed the Biscuit Hammer.
The name of the device is a reference to the song "Blues Drive Monster", by Japanese rock band The Pillows.