Timco Addax 516SDB 5/16" Hex Magnetic Socket Driver 65mm Long, 1/4" Hex Drive

Used for installing hexagon headed fasteners with a power tool. Also known as a nut setter. 5/16" Hex magnetic socket driver 65mm long with hex drive Most commonly used for driving hex head self drilling screws with a head A/F of 5/16" (8mm)