Magnetic 3D printed socket tray made by STS Auto Designs to fit the Ko-ken Wheel Nut Sockets listed below. THIN WALL The advantages of Thin-walled design are : light weight for easier handling and flexibility to access narrow work space. Standard sockets are designed according to ISO / DIN / ANSI norms. However, wheel Magnetic STS Socket Tray for Ko-ken Wheel Nut Sockets