Heavy Duty Frame Repair – Designed to fill holes in thicker metal areas such as vehicle frames, structural panels, and weight-bearing floors during restoration or fabrication work., 12 Gauge Steel Construction – Manufactured from strong 12-gauge sheet metal (approx. 0.1046" or 7/64") to match heavier factory steel used in frames and reinforced floor sections., 29 Piece Assortment Kit – Includes multiple patch disc sizes to cover a wide range of common hole diameters found in frames, floor pans, and structural body panels., Centering Tabs for Easy Welding – Tabs around each disc help center the patch inside the hole and maintain the ideal gap for clean and consistent butt-weld installation., Strong Butt-Weld Design – Butt-weld installation creates a durable repair capable of handling vibrat.