"AFCO swaged steel tubes are formed using .095"" wall DOM material. This tubing is placed in a swaging machine that forms the reduced end size using a series of hammer to die blows. The finished product has reduced ends and the wall thickness stays within +/- .001"". No stretching or crimping is used to produce an AFCO swaged tube. You can't buy a better-built tube for strength and weight savings. • Consistent wall thickness allows better thread engagement • Yellow zinc-plated for increased part life • Deep knurl for easy length adjustments "