With a diameter of 135mm the MPTC1 is a collapsible, magnetic parts tray which is ideal for holding your nuts, screws, washers & bolts. It is suitable for use in a garage workshop enviornment. The tray is designed with a rubber encased magnetic base allowing it to hold itself firmly to any ferrous metal surface & ensures your parts stay in place during any service or repair. Please note that the illustrated tools & fasteners are not included