PC computer screws standoffs kit 737pcs,104pcs mainboard standoffs( brass and iron:M3x6+6mm) 102pcs hard driver screws(M3.5x5mm);20pcs Chassis hand twist screw (black and silver M3.5 x 5) 102pcs Main board fixed screws (M3 x 6), 102pcs CD-ROM set screws (M3 x 5), 104pcs chassis fan retaining screw (black and silver M5x10),102 pcs Chassis high-strength screw (M3.5 x 6) 100pcs M3 washers, 1x screwdriver ,All screws packed within a storage box with a size chart,easy find your needed size