This is a conversion adapter that allows the use of 50mm square and 2-inch square hitch carriers and cycle carriers with a Tight Japan 50-round hitch member. Please note that the images on the 2nd and 3rd pages are optional items. The part that inserts into the hitch member uses a round pipe with a diameter of 48.6mm and a thickness of 5.1mm, so there may be some play with Tight Japan hitch members. However, a dedicated anti-rattle bracket is available for an additional 1750 yen (as shown in the 2nd and 3rd images). The distance from the center of the round pipe that inserts into the hitch member to the center of the square pipe that receives the hitch carrier is approximately 80mm. The side that receives the hitch carrier is angled at approximately 2 degrees. This is a new, unused item, but there may be scratches and uneven paint from the manufacturing process. Please refrain from bidding if you are concerned about this. No claims or returns are accepted. We are not responsible for any injuries or accidents that may occur during use. Please use this product at your own risk, and no claims or returns are accepted.