If you are building computers then these are an absolute must
Set contains:
24 pcs M3 x 6 + 6 Main board conventional brass copper column
30 pcs M3 x 5 Main board fixed screws
30 pcs red M3 x 8x1 Main board insulation gasket
30 pcs M3 x 4 CD-ROM set screws
30 pcs M3.5 x 5 Hard drive screw
6 pcs nickelplate and 6 pcs black M3.5 x 5 Chassis hand twist screws
24 pcs M3.5 x 6 Chassis high-strength screw
24 pcs white zinc and 24 pcs black M5 x 10 Conventional chassis fan retaining screw

Spercifications:
Material: metal(screws) + plastic (box)
Color: as photo shows
Box size: 13.2cm/5.20"x 7cm/2.76" x 2.3cm/0.91"(L X W X H)

Note:
The above numbers behide M are for screw tooth diameter x length,the unit is mm.
Example: brass copper column (M3 x 6 + 6)
It's specifications for: screw tooth diameter is 0.11in,teeth length is 0.23in,hexagonal copper column upper part is 0.23in long

(Attention: The main board copper column for the conventional chassis use teeth for 0.11in in diameter,there may be a few special specifications chassis can't compatible with use.)

Package Includes:
A set of computer screws (228pcs)