Material:Made of high quality brass, steel and fiber paper, steel with nickel and black zinc plated which.Package included:508 pieces computer case, power supply, motherboard, hard drives, fan, brass standoffs mounting screws and insulation washers.Styles:Total 15 different computer screws, perfect for computer case, power supply, motherboard, hard drives, fan and floppy/CD-ROM drives fixed installation.DIY Assortment Kit:Whether you are a PC building hobbyist or a professional tech, this set of replacement screw accessories is a necessity and the quantity should last for several projects.NOTE: Cause of the small things, Please do not let the children play to prevent inadvertent swallowed Package included: PWM3 x 4-----------------50 Pieces PWM3 x 5-----------------50 Pieces PM3 x 6--------------------50 Pieces M4 x 9----------------------50 Pieces M3 x 8----------------------50 Pieces 6#-32 x 6--------------------30 Pieces M5 x 10KB----------------30 Pieces PA3 x 16-------------------30 Pieces KM6#-32 x 6----------------50 Pieces M3 x 8----------------------50 Pieces 6#-32 x 6----------------------8 Pieces 6#-32 x 6----------------------8 Pieces M3 x 5 + 7-----------------16 Pieces M3 x 6 + 6-----------------16 Pieces 6#32*6BM-----------------20 Pieces Package Quantity: 508 Pieces Warning: small parts, keep away from children and k Track Page Views WithAuctiva's Counter