CO RODE 620pcs PC Computer Screws Standoffs Fan Hard Drives Thumb Screw Assortment Set Kit One set included all pc computer screws:1:hard drive screws;2:fan screw;3:Motherboard fixed screws; 4:motherboard standoffs with brass and iron two types; 5:M3 washer;6:Chassis screw;7:thumb screw 8:CD-ROM set screws 10pcs Thumb screw(#6-32x6mm),100pcs Chassis screw (#6-32x6mm), 100pcs screws for hard drive(#6-32x5BM),100pcs case screw for motherboards fixed screw(M3x6) , 50pcs case fan screw (5x10KB) 100pcs CD drive set screw (M3x5), 30pcs brass pillar standoffs for mainboard m3x6, 30pcs iron pillar standoffs for mainboard m3x6, 100pcs insulated washers in one plastic case(M3) Use for PC case, power supply, motherboard, hard drives, fan and floppy/CD-ROM/DVD-ROM drives fixed installation Package quantity: 620pcs computer pcscrews kit comes with a handy plastic box