Threshold screw set #1 for both doors. Fits 356 (1950-1955), 356A (1955-1960), 356B (1960-1963) and 356C (1964-1965) models. Forty-four screws per set. One set needed per car. Porsche Part Number Variation 644-551-001-00 644.551.001.00 64455100100 644 551 001 00