The Inno IN-AD Stays are designed to fully adjust to non-parallel rain gutters. The Inno IN-AD is a part of a complete car rack system that includes two 2 components that are necessary for installing a general-purpose base rack on your vehicle's roof top, providing the platform that will allow you to then connect roof mount gear carriers that carry your gear and equipment: Four (4) Inno IN-AD Stays -INCLUDED. Two (2) Cross Bars (Sold Separately) The IN-AD provides 6" of clearance above rain gutters and provides a secure fit, even on cars, vans and pickup trucks with narrow rain gutter styles. Protective surfaces on the stay prevent shifting and protect vehicle's paint finish. Works with all types of vehicle rain gutters and fully adjusts to line up with rain gutters that are out of parallel. Tamper-proof theft-resistant bolts with wrench included. Easy-to-follow Inno IN-AD instructions included. Inno Racks 5 Year Warranty!