Göldo, Dual-Action Trussrod for Guitar, MM-Style, 46.5mm
Trussrod for Music Man or similar. Works in both directions, like WS44G or WS44B. The disk-shaped nut (19 x 5.5 mm, see photo) can be adjusted with a 4mm Allen key or with a 3mm rod. 46.5 x 9 x 6mm.