Description:Designed with round head and standard cross recess, these screws are universal, multipurpose and easy to use.Adopting exquisite workmanship and choice material, these screws have neat thread, good abrasion and corrosion resistance.These screws are made of carbon steel, which has good hardness.The length of the storage box is 17cm, the width is 10cm and the height of it is 2.2cm.It is generally used in notebook computers, electronic machinery and so on.Item Name: Cross Round Head ScrewsMaterial: Carbon SteelProduct Length: 10-20mmSurface Treatment: Oxidative BlackeningSize Details: 17cm x 10cm x 2.2cm/6.69" x 3.94" x 0.87" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:340 x Screws (M3.5 x 10 x 50PCS, M3.5 x 12 x 60PCS, M3.5 x 16 x 50PCS, M3.5 x 20 x 40PCS, M4.0 x 12 x 30PCS, M4.0 x 16 x 40PCS, M4.0 x 20 x 30PCS, M4.8 x 12 x 40PCS)