Size following attachment NO SIZE PCS 1 3.9*16 1, 500, 000 2 3.9*19 2, 500, 000 3 3.9*25 2, 000, 000 4 3.9*32 500, 000 5 3.9*38 1, 500, 000 6 4.2*38 2, 000, 000 7 4.8*60 650, 000 8 3.9*25 2, 000, 000 9 3.9*32 500, 000 10 3.9*38 500, 000 Description: From Number 1 up to 7: SELF DRILLING SCREW: DIN7504 P: FLAT HEAD WITH 6 RIBS, PHIL 2, HARDENED From Number 8 up to 10: SELF TAPPING SCREW PHIL FLAT HEAD 6 BREAKS UNDER HEAD. TWINFAST HI-LOW THREAD, 25 DEGREES NEEDLE HARDEN ZINC PLATED