Total 10 different computer screws,all black color,400pcs in a box,easy to distinguish,meet all your needs Features: -- Contain Most WIdely Use Motherboard and Standoffs Sizes Screws. -- Made by High Quality Materiral. -- Widely Application.:Perfect for PC case, power supply, motherboard, hard drives, fan and floppy/CD-ROM/DVD-ROM drives fixed installation Package Contain: 45PC Hard Drive Screws 6#-32x6 30PC Chassis High-Strength Screws 6#-32x6 10PC Classic Hand Twist Screws 6#-32*6 25PC Chassis Fans Retaining Screws M5x10KB 40PC Main Board Fixed Screws M3x5x7 30PC Standoffs Screws M3x6+6 50PC Flat Phillips Head Screws 6#-32x6 50PC SSD Screws M3x3 50PC SSD Screws M2x4 70PC Insulating Gaskets M3x8 Warning: small parts, keep away from children under 5 years.