this were the strongest rods i have ever tested hands down. Dyer's 300M Steel H-Beam Rods
Manufactured from U.S. made 300M steel forgings, which are 20% stronger than 4340 steel. The H-beam design with a double banded cap for ultimate strength, they use ARP2000 capscrews as standard equipment (220,000) psi, CNC machined to eliminate mistakes, Vacuum Furnace Heat Treated with Cryogenic Treatment, include AMPCO 45 Bronze Pin Bushings for maximum strength with low deformation. buff it cost more to forge rods then it is to cut from a piece of billet.