The I-Bolt is a 2″ x 1-1/2″ loop connected to a 7″ long steel shaft with uniquegripping teeth that lock into the threaded holes on the front or rear of thevehicle. Insert the I-Bolt into the threaded hole, ideally behind the nut orthe back of the hole, engage the gripping teeth by turning the loop clockwise(while holding the knurled 1-3/4 ” knob) until the teeth engage behind the nutor in the threaded hole.The I-Bolt is able to fit threaded holes having diameters of 1/2″ up to 1-1/4″.This unique design provides a universal hook up solution for the 200+ vehiclesidentified in the Towing and Service Manual from AAA. Also included is a 6′ x2″ polyester safety strap with a 4″ looped end to wrap around the control armor sway bar and a 3-1/2″ steel flat snap hook that attaches to the I-Bolt topositively secure the vehicle. The I-Bolt has been certified to pull up to1,500 lbs. Winch the vehicle until all 4 four wheels are on the bed, and thenlevel the bed. Continue to winch and stop 3-4 ft. short of the winch itself toavoid bending the I-Bolt and damaging the bumper. Once the vehicle is loaded,remove the I-Bolt and secure the vehicle. 2″ X 1-1/2″ Loop connected to a 7″ long steel shaft Has unique gripping teeth Fits threaded holes having diameters of 1/2″ up to 1-1/4″ Also includes a 6′ x 2″ Polyester Safety Strap w/4″ looped end Certified to pull up to 1,500 lbs. Replacement strap # 71490-Strap