2-in-1 clutch hub lock nut driver.
4 Tang socket, 1/2" Drive.
Tang sizes: O.D. 24.6 mm. I.D. 20.6 mm. 4 Pins, Pin width 5.2 mm. O.D. 29.6 mm. I.D.24.6 mm. 4 Pins, Pin width 5.2 mm.