Specification Brand : Sealey BulletPoint1 : Forged Chrome Vanadium steel socket with S2 steel bit. BulletPoint2 : Sockets are heat treated and chrome plated with a fully polished mirror finish. BulletPoint3 : Knurled ring for extra grip with oily fingers. BulletPoint4 : Country of Origin: China BulletPoint5 : 【WIDELY USED】Suitable for all the hexagonal side handle four square hole groove, which is applied to repair, modification, wrench socket transformation, suitable for use with hand tools and is not recommended for use with electric or air tools Color : Phosphate Noir CompatibleFastenerDescription : 0.375 inches CustomerPackageType : 1 DriveSystem : Square ExternallyAssignedProductIdentifier : 5054511779493 ExternallyAssignedProductIdentifier1 : 0840052800162 ExternallyAssignedProductIdentifier2 : 840052800162 FinishType : Mirror,Mirror Finish,Polished ItemLength : 2.8 inches ItemName : Sealey 8mm 3/8"Sq Drive Hex Socket Bit - SBH011 ItemPackageDimensions_Height : 0.1 meters ItemPackageDimensions_Length : 0.01 meters ItemPackageDimensions_Width : 0.04 meters ItemPackageQuantity : 1 ItemTypeKeyword : one-way-drive-sockets Manufacturer : Sealey Material : S2 Steel Chrome Vanadium Steel ModelName : 8mm 3/8"Sq Drive Hex Socket Bit ModelNumber : SBH011 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PackageLevel : unit PartNumber : SBH011 ProductDescription : * Made of chrome vanadium steel construction for strength and durability. * To protect against rust and corrosion, the black phosphate finish absorbs and holds oil, repelling moisture. * Beveled drive end helps guide extension smoothly onto drive tool * Four detent grooves provide a secure connection with the drive tool. * When space is limited, it increases your access and gives you a better angle by working around obstructions and into tight spots. * Suitable for use with hand tools and is not recommended for use with electric or air tools * Widely used in mining, metallurgy, shipbuilding, furniture repair and other industry.