Accessories:Front Lower Arm-2pcsStainless Steel Cap Head Screw 3x10-2pcsSteel Pin 3.17x24-4pcsStainless Steel Round Head Screw 3x16-2pcsManual number:8631+8632Product major function & usage:To support front knuckle arms, increase stability of front chassisMajor advantages of upgrading to this product:1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater support and durability. 2. Delrin collars are inserted to minimize the gap and strengthen the fitting for a smooth and stable drive. 3. Modern 3D streamline made by CNC machine and anodized with metallic colors bring strong visual impact. 4. The fixing method of the stainless steel ball is changed to our special screw locking design for better security.We use a quality light weight high tensile strength aluminum 6061 T6 and is then anodized with scratch resistant colorsWe also have a big selection of multiple colors available now!! Let¡¯s ¡°hop up¡± your vehicles to give them the best looks and performance on the market ¡¦ colors are available in blue, red, grey silver/gun metal, orange, green, black, brownWe have taken the time to individually, to carefully QC every part ¡¦ this is another advantage of GPM having our own concept design fabrication and manufacturing facilities ¡¦ almost all other companies outsource all of their production do very little QC never taking the time to unpackage, QC, then repackage their parts before shipping. GPM offers the best Quality Control and after product sold services, to include constantly making our pro team racers and staff available for any question or advice