The Chromoly joint housings are heat treated for increased strength and then zinc plated for corrosion resistance.
The hard chrome plated inner ball is machined from billet 52100 steel for strength and durability. The inner raceway provides wear resistance, high frequency vibration isolation and durability.A;California Residents: WARNING Rock Krawler Krawler Joint, 3/4 Inch Shank - RK01222L The Pro Krawler Joint is a revolutionary joint manufactured with the tightest tolerances for ultimate consistency. Universal fitment;Corrosion resistant zinc coating;Fully machined Chromoly joint housing;16 TPI;Left hand thread;14 MM bolt bore;2.