Milwaukee Genuine OEM 49-66-4417 3 Piece Thin Wall Deep Impact Socket Set w/ Radius Corners and Hex Socket Adaptor (Driver Not Included) INCLUDES: 1 x 1/2" Impact Socket, 1 x 9/16 Impact Socket, 3/8" Socket Adaptor THIN WALL CONSTRUCTION: The thin-walled build of these sockets will allow you impact-level strength when fastening in low-clearance applications UNYIELDING BIT ENGAGEMENT: The deep hexagon-shaped wells engage with fasteners right at the corners for maximum grab CHROMOLY STEEL: This proprietary steel alloy is designed for higher-impact jobs than standard carbon-steel HEAT-TREATED: This final layer of protection by Milwaukee toughens the sockets up further, letting you use them for industrial or automotive applications with minimal fear of wear and tear