Forged from the finest chrome molybdenum alloy steel - the best choice for strength and durability. Extension Size: 6". Allows better access for the hard to reach fasteners. Fully guaranteed No doubt, Sunex tools offer one of the most complete and toughest Impact Socket lines around. This 3/4" drive, 6" extension impact socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job. Also it allows for a better reach in confined areas.