Specification Brand : HARFINGTON BulletPoint1 : Size - Head Dia: 8mm / 0.31", Length: 6mm / 0.24", Screw Size: 7 x 7mm / 0.28" x 0.28"(L*D), Thread Specification: M3, Color: Black. BulletPoint2 : Material - Round flat head rivets are made of zinc alloy with smooth surface, ensuring good-looking, durability, hardness, and resistance to rust and wear. BulletPoint3 : Features - Screw back designed, easy to install and remove, just insert into the pre-punched hole, tightened it by a screwdriver. BulletPoint4 : Applications - Widely used for DIY crafts and fastening various kind of leather crafts, such as wallets, backpacks, pants, mobile case, bags, shoes, clothes, belts, jeans, hats, etc. BulletPoint5 : Notice - Make sure the button stud is properly aligned and apply even pressure when installing to ensure a secure fit. Color : Black FcShelfLife : 365 days GpsrSafetyAttestation : 1 ItemDisplayWeight : 0.15 kilograms ItemName : HARFINGTON 100set Round Flat Head Screws Buttons 5/16" Metal Stud Screw Rivets for DIY Leather Craft Bookbinding, Black ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 1.7 centimeters ItemPackageDimensions_Width : 6 centimeters ItemPackageQuantity : 100 ItemTypeKeyword : leathercraft-rivets Manufacturer : HARFINGTON Material : Zinc Alloy ModelName : Aqur2020hsgfr6qv08-13 ModelNumber : hta240426hh001793 NumberOfBoxes : 1 NumberOfItems : 200 NumberOfPieces : 100 PartNumber : hta240426hh001793 ProductDescription : Round flat head rivets are made of zinc alloy with smooth surface, ensuring good-looking, durability, hardness, and resistance to rust and wear. Screw back designed, easy to install and remove, just insert into the pre-punched hole, tightened it by a screwdriver. Widely used for DIY crafts and fastening various kind of leather crafts, such as wallets, backpacks, pants, mobile case, bags, shoes, clothes, belts, jeans, hats, etc.