Our knurled head screws are crafted from ABS and stainless steel, offering exceptional strength and durability. Designed for easy hand tightening, making these screws nice for applications where frequent adjustments are needed. Use them to secure components in machinery, ensuring a reliable and stable connection with minimal effort. Features -Specification: m4x30mm - Color: Black -Material:Stainless steel, ABS - Size: 4.00X1.40X1.40cm/1.57X0.55X0.55in -Built to last: made from stainless steel and ABS, these screws offer exceptional durability and reliability for long term use in various settings -Effortless installation: the knurled screws make installation and removal straightforward, reducing the risk of damage and enhancing ease of use -Wide range of applications: these screws can be installed in numerous locations, making them ideal for everyday use and replacement needs -Easy hand tightening: the knurled thumbscrew screw allows for manual tightening without the need for tools, saving effort -Reliable grip: featuring excellent antislip properties, these thumbscrew screws ensure a secure hold and are resistant to loosening, providing stable and reliable performance Package list: 10 x thumb screws