SK Hand Tool 32318 1/4-Inch Drive Swivel Fractional Impact Socket, 9/16-InchBrandSK Hand ToolLength2'Drive SystemHexAbout this itemSureGrip Drive Design drives the side of the fastener, not the corner, to provide increased strengthCoated with a rust-preventative compound that makes them exceptionally resistant to corrosive factors30 degree flex angle and smooth collar design