-Thread Diameter Size : M2 M2.5 M3 M4 M5 M6 -Length : 3mm – 40mm ( Not including head length ) -Head Style : Round Flat Head -Material : 303 Stainless Steel -Tolerance range: ±0.2mm – Features : Beautiful appearance, multi color will fit well in different occasions. – Ues for : Computer cases, electric toys, motorcycles, locomotives, fishing gear, furniture.