Genius Tools 433809, Hand Socket 9mm 1/2 Inch Drive 12-Point High-Precision Chrome Finish. 1/2" Inch Drive Size with an overall length of 38mm (or 1.5 Inches). Made from Chromium-vanadium Steel Alloy for high strength and durability while having anti-corrosive properties. Sizes are stamped for permanent and easy identification of size.