The shaft of the raze black series bar is finished in manganese phosphate which was chosen for its hardness and superior corrosion resistance and features the raze signature dual profile knurling which has been developed to ensure a consistent grip when lifting but at the same time to not too aggressive when receiving the bar the black design on this bar makes is the perfect partner for the raze black series bumper plates bar details of the raze black series bar men s bar weight 20kg shaft