Specifications High-concerned chemical:None Dimensions:M2.5*8 DIY Supplies:Metalworking Model Number:M2 M2.5 M3 Material:Carbon Steel Origin: China p{margin-block-start: 0; margin-block-end: 0} MaterialThe assorted screws are made of carbon steel with black oxidation, which feature is strength and offers resistant to rust, good corrosion resistance in bad environment. 10 SizesThe small bolts include M2*3; M2*4; M2*5; M2*6; M2 .5*4; M2.5*5; M2.5*6; M2.5*8; M2.5*10; M3*4, total 600pcs cross flat head screws. Wide ApplicationMicro cross head screws are suitable for notebook, PC case, power supply, motherboard, hard disk, fan, motherboard box, HDD SSD fan and floppy/CD-ROM/DVD-ROM drive fixed installation etc. Stability WorkmanshipThe head of the countersunk head screw can be flush with the surface of the computer, tiny bolts, deep thread, uniform pitch, balanced force. Black screws are also very suitable for electrical appliances of any color. Convenient StorageNotebook screw set equipped with a transparent plastic box with multiple partitions to keep each model separate, which makes you convenient to select the right screw type or put it back,and avoid losing .