Product Feature: Boat trailer winches are ruggedly constructed of high quality aluminum with a galvanized finish for increased corrosion resistance. The rollers are larger and softer and will not harm the hull. Product Function: You can easily adjust the height of the leaning post with the adjustment screws, minimum height: 17.3 inches, maximum height: 21.5 inches. Suitable for a variety of boat types including fishing boats, speedboats and motorboats. Easy Installation: The included U-bolts quickly lock the trailer tow bar into place and use jam nuts to hold it securely in place. Safety line on the bottom of the winch bracket prevents boat slips and falls. Compatibility: This product does not come with a winch, you will need to purchase your own or use a winch you already own. Will fit almost most winches. Note before buying: This boat trailer winch post fits trailer tow bars that are 2-2.7“ wide and 3.2” tall. NOTE: Please check if it fits your trailer towing base size before purchase. Quality Service: Our NURATIT brand pays great attention to customer's shopping experience, so we provide one year after-sales service, our customer service 7*24 hours online, Amazon's service window is only three months, after more than three months if you have any questions about this Boat Trailer Winch Stand, you are welcome to come to me for enquiry.