The Rattle Stop fasteners securely attach the license plate and frame together on the 2 lower fastener holes to prevent rattling. The kit includes: 8 standard fasteners for domestic vehicles, 8 metric fasteners for import vehicles, a unique Star Pin key for installation, 4 rubber washers, 2 plastic nuts and 2 metal nuts.  The locking Star Pin fasteners are designed to deter removal of a license plate. Designed to fit all novelty/license plate frames