Abstract: A fastener driving tool and an attachment for positioning a disc at a nosepiece of the fastener driving tool are provided. The fastener driving tool includes a tool body having the nosepiece extending along a discharge axis for discharging a fastener, and the attachment. The attachment includes a coupling section having a body defining a hollow portion configured to receive at least a portion of the nosepiece of the fastener driving tool and a positioning section adjacent to the coupling section, the positioning section including a lip defining a slotted area having an open side configured to receive the disc and at least one magnet for magnetically holding the disc in the positioning section.