Anodized 6061 aluminum alloy, T6 heat treatment, high strength, thread, not easy to slip. The set of screws weighing 17 grams will not increase the weight of your vehicle. Note: The outer screw cover is a reverse thread, clockwise is loose, counterclockwise is tight, the inner screw is positive thread, clockwise is tight, please pay attention when installing and removing. Cut from No. 45 high-strength steel, heat treatment greatly improves durability, surface plating treatment can prevent rust, you can use ordinary open-end wrenches and 1/2 torque wrenches. The recessed design in the middle fits the screws completely and will not harm your screws, and the strength accuracy has reached the use of professional car shops. Screw: Material:Aluminum alloy Color: Black Type:M18/M30 Weight:17g Disassembly tool: Material: 45 steel Colour: as shown Package Contents: 1 * Disassembly tool 1 * Screw tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.