If you find your shackle pins are just too small to work with the mounting holes in your receiver hitch, the Moose Knuckle Shackle Adapter Sleeves are perfect for filling that gap! These shackle sleeves are made strong with grade 8 steel, providing long-lasting durability. They come in five sizes for use with different shackle and hole combinations, and come with a yellow zinc color. Don't let those small shackles get you down, order your Moose Knuckle Shackle Adapter Sleeves today!