Specification Brand : uxcell BulletPoint1 : [Size] - 1/2" square drive, 23mm 6-point socket, 40mm (1.57") total length. BulletPoint2 : [CR-V Steel] - Forged with heat-treated chrome vanadium steel and with black phosphate finish for corrosion-resistant and strength. BulletPoint3 : [Design] - The rounded corners prevent fastener wear and increase torque on fasteners by placing force on fastener's flat sides, rather than fastener corners. BulletPoint4 : [Pin Hole] - Individual pinhole base design adds extra security by placing in a locking pin for stability when exerting strong torque motion,. BulletPoint5 : [Widely Use] - For disassembly and tightening of hexagon head bolts and nuts, especially suitable for requiring large torque and narrow space. The product has no insulation properties and is not suitable for electrical environments. CompatibleFastenerDescription : 0.5 inch DriveSystem : Square FinishType : Corrosion-resistant,Black Phosphate Finish ItemLength : 1.57 inches ItemName : uxcell 1/2" Drive by 23mm 6-Point Impact Socket, CR-V Steel 1.57" Length, Shallow Metric Sizes ItemPackageDimensions_Height : 13.589 centimeters ItemPackageDimensions_Length : 3.9878 centimeters ItemPackageDimensions_Width : 10.795 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : triple-square-drive-sockets Manufacturer : uxcell Material : Chrome Vanadium Steel ModelNumber : a21040300ux0026 NumberOfPieces : 1 PartNumber : a21040300ux0026 ProductDescription : Made of chrome vanadium steel for strength and durability. With black phosphate finish, prevents rust and corrosion. Has a 6-point opening, it can fit tightly to the hexagon of the fastener head so that the maximum torque can be applied without slipping. To prevent round-off under stress, it grips the flat sides of the fastener head rather than the corners. The through-hole in the drive end locks onto the tang of impact wrenches or drivers so it won't fall off or stick on fastener heads. Widely used in DIY hand-making, household maintenance, and most general repairs. Specifications: Socket Size: 23mm Drive Size: 1/2-inch Total Length: 40mm / 1.57-inch Material: Chrome Vanadium Steel (CR-V) Finish: Black Phosphate Color: Black