Made of brass (brass/brass) Gold Color: This is a flat washer with an outer diameter of 1 larger than the traditional JIS standard. The nominal diameter of the screw used and the inner diameter of the washer has a slightly larger holes. Brass has a beautiful metallic luster and has excellent conductivity and corrosion resistance. It is used to disperse surface pressure when tightening bolts, small screws, and nuts, to prevent damage to the opponent material, and to prevent recess when the bottom hole is large, etc. Excellent corrosion resistance. In addition, it has good conductivity, so it can be used to tighten the electrical connection. ■ Screws and nails in a small quantity pack in the specified package unit. Please check the quantity in total. The posted images are for reference only.