Cruiser Accessories patented Rattle Stop hardware is designed to keep your license plate secure and quiet. The Rattle Stop feature is designed to keep the license plate from rattling, while our uniquely designed trademarked Star Pin locking fasteners deter removal of any license plate frame from a vehicle. All fasteners are designed to work with our entire line of license plate frames, shields, mounting plates and fastener caps. Product Features:Rattle Stop feature is designed to keep the license plate from rattlingFasteners with the star center makes it impossible to remove screws without special Star Pin keyKeep the key for future useMade of stainless steelMetric designed for use with import vehiclesIncludes 4 plastic washers, screw grommets, fasteners and special key for installationFasteners measure 6mm x 20mm (0.23 x 0.787)