stole this ad from daves site :
Drag-lite A-Arms and J-Arms are some of the lightest, safest, best fitting, and most adjustable A-Arms out there. Made from 4130 chrome-moly and hand TIG welded in our shop to ensure quality and fit, these a-arms will allow the rider to set up the caster and camber that he or she is most comfortable with. The Drag-Lite A-Arms use heavy duty 3/8" and 1/2" rod ends, which are commercially available at any major bearing supplier. Currently, the Drag-Lite A-Arms come in only stock length and offset, and are designed to use either stock or after market Drag-Lite spindles. These a-arms are intended for closed course drag racing on stock frame applications. All a-arms come raw . weight of this set is 7 lbs.