They are designed to grip the side and not the corners of the fastener heads, which prevents round off. Their extended length allows the deep socket to fit over long fasteners and reach into recessed areas easily. It is primarily used for automotive maintenance and general mechanical work. They can withstand higher torques and even though you need a wider work area to use them, they do have a wider application range. Impact socket sets are typically manufactured from chrome vanadium molybdenum steel which makes them well suited for use in heavy industrial applications because of their strength and durability. Sizes included: 7 ,8 , 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 mm Founded in 2008, Impact Tools began as a family enterprise, manufacturing a large range of socket sets and hand tools, and over time has expanded its expertise into a broader portfolio with a national footprint. Today, Impact Tools remains an Australian family business that is renowned for its high-quality Impact socket sets for the hardware market and a wide range of specialised industrial applications.