150 PCS M3 M4 Black Round Head Self Tapping Screws

【High Quality】: The screws are made of high quality carbon steel, and the surface is coated with black zinc. It has high hardness, which is not easy to deform or bend. The thread is clear, stable and good. 【Quantity】: There are 150 black self-tapping screws: M3x12 (25 pcs), M3x16 (25 pcs), M3x20 (25 pcs), M4x12 (25 pcs), M4x16 (25 pcs), M4x20 (25 pcs). 【Easy Access】: Round screws are stored in a separate transparent plastic box and placed according to various sizes. It is easy for users to access and carry. 【Perfect Design】: Black screws are round-headed, embedded material to keep the object beautiful. The sharp tip of the screw secures the material quickly and would not loosen easily. 【Wide Application】: Self-tapping screws are mostly used in furniture, door locks, door handles, mechanical installation and maintenance. And it is widely used in household, electronics, electrical, mechanical and other industries.