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1 Control arms need to be all about strength and rigidity. Control Freak's upper and lower arms utilize tubes of seamless DOM (drawn over mandrel) construction, with plate, bracket, or gusset sections that are laser cut. They are welded together on vibratory tables for complete penetration, and then powder coated for durability. Ball joint housings are CNC-machined at an angle that eliminates bind even on lowered vehicles. Fastener hardware is all Grade 8, including the supplied Nyloc nuts, and all are yellow zinc-coated for corrosion resistance.