A CURT anti-rattle hitch pin provides smoother, quieter towing by tightening down your trailer hitch connection and deterring noise and vibrations. The anti-rattle kit is comprised of a threaded pin and shim. The shim inserts into the towing accessory shank and can then be installed into the receiver. Then, the threaded hitch pin inserts into the side of the receiver and gets tightened down with a wrench. Together, the hitch pin and anti-rattle shim lock the shank in place and promote a quiet and more enjoyable towing experience. This anti-rattle trailer hitch pin and shim device fit a standard 1-1/4-inch x 1-1/4-inch receiver with a 1/2-inch pin hole. The kit is compatible with hollow-shank accessories only.