◎Remove the rear wheel nut of ROR trailer to change the bearing. ◎The robust socket is manufactured from a piece of material. ◎It can be used with torque wrench for installing and removing. ◎Material: SCM440. ◎Size: Dr. 1", 8 POINTS, 3 1/4",83 mm ◎Application: ROR TM series Trailer rear wheel nut.