When you use a hook-up device, you may encounter some problems, such as noise and noise. Something as simple as a hook-up device can do this.This fastener fits most 3.85 cm and 7.62 cm hooks. Therecompatible withe, it can handle a large number of trailers, bicycle racks, cargo box luggage racks, etc.Made of carbon steel, this is a very good quality fastener with upgraded ultra-thick U-bolts and plates. It is designed to reduce noise and keep items locked, even in bad weather conditions, the distance you have to travel. You can expect this to be very sturdy.Follow the installation instructions below, it won't be as difficult as you think. How to use: First, and most importantly, you need the following tools: 1.95 cm socket or wrench, U-bolt, fastening plate, washer, lock ring and nut. Then, put the U-shaped bolt on the twister, and then fix the fastening plate on the U-shaped bolt. Next, place the nut and tighten the washer by hand. Finally finish with a wrench.Colour: black, silverMaterial: carbon steelPackage Contents:2 * Hitch tightenerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.