Thule 625 Force XL Cargo Box 17 cu. ft.The Thule XL Force Box offers value and space while still offering key conveniences. Details: Diamond Textured AeroSkin Lid is durable and the aerodynamic shape helps cut through the air. Tool Free Quick Grip mounting system attaches box to rack in less than 5 minutes. SecureLock ensures that all gear is locked and box is properly closed prior to driving Dual Side opening for easier loading and unloading from either side of the vehicle 2 One Key Locks