[Product Parameter] Screw dimension: M4 x 25mm (thread diameter*total L); Head type: slotted flat head; Package Contents: 100pcs x Wood Screws [Material] - Made of brass for high strength, corrosion resistance, durability and long-term reliability. [Flat head design] - Flat head screws can keep the surface flat after installation. Self-tapping screws can pass through wooden products without pre-drilling. [Application] - A flat head screw is generally used when the fastener protrudes above the contact surface is not acceptable. It is widely used in construction, industry, commerce, etc. For example, for woodworking, external and marine use. [Note] - Please wear gloves to protect your hands when working. Please allow 0.1mm-1mm measuring difference due to manual measurement.