The Sunex SX-278 Air Punch Flange Tool is a heavy-duty pneumatic powered tool designed for automotive use. With a 8mm and 5/16" capability, this tool is powerful and versatile for various flange punching tasks. The Sunex brand ensures durability and reliability, making it a trusted choice for mechanics and automotive professionals. The tool's manufacturer part number, SC-278, indicates the specific model designed for maximum performance and efficiency.