LBY 900pcs Washer Truss Head Wood Screw Assortment Kit. Material: carbon steel. Main Color: black. Surface treatment: blacking. Material grade: carbon steel 4.8 grade. Package: M2.3x5x6mm 100pcs, M2.3x8x6mm 100pcs, M2.3x12x6mm 100pcs, M2.6x5x6mm 100pcs, M2.6x8x6mm 100pcs, M2.6x12x6mm 100pcs, M3x8x8mm 100pcs, M3x12x8mm 100pcs, M3x16x8mm 100pcs. Washer head self-tapping screws, made of carbon steel, surface blacking treatment. Larger head provides a larger bearing surface area. Standard cross head screws. The Screw have complete thread. Widely used in thin pieces of furniture, electrical equipment, toys, electronics, small appliances. Note: Pilot hole must be drilled prior to driving screws. The product is not suitable for very thick wood due to its limited hardness.