The Thule 539 Mastholder for Sailboard/Windsurfer Racks also carries canoe and kayak paddles. Sold in pairs to hold one mast (or multiple paddles). Includes 2 straps. Attaches to Thule roof base rack square cross bars only.
Mastholder fits virtually any mast size, with or without sail 51mm down to 40mm.
Sold in pairs with 2 straps included.
Easy-to-follow instructions included.