... -21 Finish:Black,Passivated,Zinc Hexagon socket set screws with flat point DIN913Material:Stainless Steel,Carbon Steel,Alloy Steel1) Various kinds ... supplied with different finish, such as bright, zinc plated, black4) Can be made with different standards, such as ISO, DIN, ANSI ... :1. If you want to test the quality and we can accept small quantity but no 1 or 2 pieces, thanks ...