Material Stainless Steel Head Style Hex Wire Size 4mm Head Type Hex Size M4* 12/100 Pieces About this item Material: Made of high quality stainless steel, durable, not rusty, corrosion resistant, eco-friendly, non-toxic and long term. Sharp wires: The wire is very sharp and difficult to deform and slip during the rolling process. After installation, it has good fixing power. Standard Hex Socket Recess: Our screws conform to the standard metric system. It is not easy to slip during the installation process. Easy to install: It can be directly locked into wood or thin iron materials. It has high strength, is not deformed and not easy to break. Widely Used: The hexagon head self-tapping screw with good clamping force can be used for most woods, boards, kitchen worktops, cabinets, cupboards and a variety of other projects.