Feature●Quantity: 100 pieces; Size: 4.0 x 25●Material: Stainless steel, SUS410●Country of Origin: Japan●Head shape: countersunk surface treatment: Pacific●20 pieces are also sold separately on Amazon. https://www.amazon.co.jp/dp/B01F1KQY3U/Description
Packaged in PP pack 20 pieces are also sold separately on Amazon. https://www.amazon.co.jp/dp/B01F1KQY3U/