Comparison : Item # SSW1, Small Size 3-1/8 Inch (in) Minimum Pole Opening Width Stainless Steel Winch
Item # SSW2, Large Size 3-5/8 Inch (in) Minimum Pole Opening Width Stainless Steel Winch
Item # SSW3, X-Large Size 6-5/8 Inch (in) Minimum Pole Opening Width Stainless Steel Winch