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 Billet Upper 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 A-Arms. *If currently running a Zbroz A-Arm Kit, replacement lower or upper A-Arms are available upon request - please call for details.