Computer Screw Kit for DIY Assembling 775pcs All 775Pcs PC Screws are in one plastic case; Package:100pcs fan screw, 100pcs case screw, 100pcs drive screw, 100pcs hard drive screws, 100pcs screw for motherboard, 100pcs CPU fan screw, 25pcs brass pillar for mainboard, 100pcs M3 metal washer, 25pcs M3*10*0.8 insulated washers, 25pcs M4*10*0.8 insulated washers, Besides, 3pcs Thumb screw and 5pcs shockproof hard disk screw are available free of charge