Whitecap Stainless Steel Danforth/Fortress Anchor RollerWhitecap's Anchor Rollers make anchoring and anchor retrieval easier. This anchor roller works with boats ranging from 16' to 54' in size and is best suited for use with Danforth and Fortress anchors. These rollers are constructed of durable 304 stainless steel and are available in three lengths.Specifications:Part NumberLengthLine SizeWidthInside WidthFastenerBoat LengthAR-648716"1"3-1/2"1-3/4"3/8" (3)16' - 20'AR-648819"1-1/2"5"3"3/8" (3)25' - 35'AR-648926"1-1/2"5-1/2"3-1/2"3/8" (3)25' - 54'