Features: AM4 CPU heat sink bracket.For am4 motherboard and clip-on cooler . The pin has a small hole corresponding to the main board, which is firm and practical.90x54mm mounting hole distance with 4 screws. AMD CPU Fan Bracket Base for AM4(Motherboard chipset B350 X370 A320 X470). For hook-type air-cooled or partially water-cooled radiators (B1220/B240).