Material: 304 Stainless SteelHead Style: External Hex HeadDrive Style: PhillipsThread Specification: M3, M4, M5, M6Length: 6, 8, 10, 12, 16, 20, 25, 30, 35, 40mm ( Not Including head length.)You can find more products in several material, type, color , sizes and shapes in our shop! If you have particular needs, please touch us, we will customise per your needs!Package includes: 5/10/50 pieces * According to your choiceNotes:1.The shade of the image is slightly varied from the genuine object because of the digicam and light effect, please take the actual object as the standard.2.There is probably 0-0.3mm error for its thickness, 0-3mm error for its diameter / width / length in the guide measurement, please take it into consideration, thank you!