3/8” square drive sockets, metric, 6 point and double hex, long and extra long length from Apex Fastener Tools formally Cooper Tools. Apex industrial grade long and extra long length impact sockets are available in a wide range of hex opening sizes and with single or double hex openings. Apex double hex impact sockets are identified with a -D suffix. Fast Lead impact sockets from Apex Fastener Tools are designed for multiple spindle or standard power tools. The tapered opening of this Apex socket almost instantly provides total engagement with the nut upon engagement. This speeds productivity and extends tool life. Engagement is possible without starting and stopping the tool for each nut. These Apex impact sockets are identified with a FL- prefix.High strength fasteners in demanding situations, like those found in the automotive and aviation industries, often require the use of an impact wrench or impact driver to deliver the amount of torque required to tighten or loosen them. Apex impact sockets are specifically designed and manufactured for high impact use, and made from a tougher and more ductile alloy steel which is then heat treated for extra durability.Apex impact sockets are heavy duty sockets for use with air or electric power impact tools. Apex impact sockets are designed to stand up to the extreme stress of these tools and can be used in combination with special impact accessories such as extensions, universal joints, and adapters. Standard sockets are not equipped to handle the high torque of an impact wrench due in part to the materials used to make them. Standard sockets are usually made from chrome, which is a fairly soft metal alloy and can split and shatter when exposed to excessive vibration. Apex impact sockets are designed to handle the torque and flexibility of these conditions without the product failing or shattering.