High-precision metal screw who has a shoulder, enabling the screw to move slightly inside the top deck. This unique screw allows fine customizations for the carââ¬â¢s flex, by adding and/or removal of them towards vehicle upper deck. Including several screws towards the trunk area of the top deck wil dramatically reduce rotation and increase security. The automobile could have more grip, and much more security under stopping. Including several screws towards leading the main top deck will support the car both on-and off power, nonetheless it will reduce steering it is more likely to make the car simpler to drive. Machined from HUDY Spring Metal. Set of 2.