Zbroz Racing Lower A-Arms for the Pro RMK AXYS chassis are made from high-grade chromium-molybdenum steel for extreme strength while shedding pounds over stock. Upper A-Arms are cut from a sold block of Aluminum, anodized your choice of color Black, Red, Orange and Blue. The Upper Billet A-Arms alone save 1/2 pound. This is the new bling with style you need for your next build or replacement of those flimsy stock arms. Designed to be used with your stock Tie Rods - Tie Rods not included. *If currently running a Zbroz A-Arm Kit, replacement lower or upper arms are available upon request - please call for details.