the disc piece [nail shaped] is part of the needle, it's the 'hub' that presses on the shaft and is factory attached to the needle, the shaft is just a straight "wire" that is part of the magnet in the bell
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics