Design and Details Sold in pairs " combine with HandRoll or an additional DeckHand to complete the set Large rubber rollers provide a built-in load assist to help guide your boat into place Durable rubber pivoting rollers adjust to boat shape for secure loading Roller pivot design automatically adjusts to boat (TM)s shape for a secure hold Universal mounting hardware fits most roof racks Easy tool-free installation lets you quickly mount, load and go Locks to roof rack with SKS Lock Cores (sold separately) Includes Heavy-Duty Straps and Bow/Stern Tie-Downs