2200PCS M2 M3 M4 M5 Metric Screws Assortment Kit, Hex Socket Button Head Assorte
Lenths of the thread M2x4mm/8mm/12mm/16mm. M3x6mm/8mm/12mm/16mm. M4x8mm/12mm/16mm/20mm. M5x8mm/12mm/16mm/20mm. And the average error is less than 0.01mm,perfect for professional and DIY projects.