Genius Tools 665276, Impact Socket 2-3/8 Inch Size 3/4 Inch Drive High Strength CR-Mo Steel Durable Heavy Duty. 3/4" Inch Drive Size with an overall length of 80mm (or 3.15 Inches). Made from Chromium Molybdenum Alloy Steel for high strength and durability while having anti-corrosive properties. Sizes are stamped for permanent and easy identification of size.