A cutting tool includes a cutting body and a connecting structure configured to support the cutting body. The cutting body can include teeth positioned circumferentially around and extending outwardly from the cutting body. The connecting structure can include a drive shaft for drivingly connecting the cutting tool to a power tool. The connecting structure can also include a connecting plate and a locking member for securing the cutting body to the connecting structure. In some embodiments, the locking member is movable relative to the drive shaft between a locked position, in which the locking member secures the cutting body to the connecting structure, and an unlocked position, in which the cutting body is removable from the connecting structure.