If you find that your shackle pins are too small for the mounting holes in your receiver hitch, the Moose Knuckle Shackle Adapter Sleeves are the ideal solution. Made from robust grade 8 steel, these sleeves offer exceptional durability. Available in five different sizes to fit various shackle and hole combinations, they come with a yellow zinc coating. Dont let mismatched shackles slow you downorder your Moose Knuckle Shackle Adapter Sleeves today!