05664 HITCH BALL, 2" WITH 3/4" SHANK | Cold-forged for great strength. When installing, torque all 3/4 in shank balls to 160 ft-lb, all 1 in to 250 ft-lb and all 1-1/4 in to 450 ft-lb. Balls with longer shanks are designed for use with step bumpers. Engineered to meet all safety requirements of VESC regulation V-5.