ACCESSORIES:Stainless Steel Button Head Screw 2.5*25 - 1pc2.5*10 - 2pcs2.5MM T Stainless Steel Lock Nut - 1pc1.This Suspension arm is an important to support the stability between the upper chassis and the rear axle. 2. White Delrin inserts are in place to keep this part snug and secure, and also preventing metal friction adding to the life of this and other related parts. Good stuff3. Our GPM Race design and concept team have decided to upgrade this part from the flimsy plastic to a quality light weight high tensile strength alloy, aluminum 6061 T6 . Furthermore then it is anodized with 7 different scratch resistant colors ¡¦ the appearance is really nice and the part is indestructible for any type of RC racing/crawling.