Currectlync Modular Extreme Duty Steering Rod End Cartridge (GM 1T Taper) RockJock 4x4RockJock's Currectlync rod end cartridges will fit any of the Currectlync universal rod end forgings. These cartridges feature a 1 ton taper on the pin, that fits the tapers found in the knuckles of most 1 ton axles) and will thread into RockJock's modular extreme duty forged rod end bodies from the top or the bottom, allowing you to create the perfect steering combination for your vehicle. Cartridge kit includes the cartridge, a universal boot, boot