The Steering Coupler U-joints utilize the latest in CNC machining technology. The U-joints are made out of the highest quality steel and have been thoroughly tested. Similar to OEM automotive U-joints, the staked needle bearing caps prevent loosening and adjustment malfunction.The shaft is a DD that can be easily trimmed to exact length needed. Shafts are 12" in length as received. Also available are vibration reducers (Detroit Speed recommended) which significantly reduce vibration in the steering wheel and have also been shown to increase the overall life of the steering components. The Steering Coupler comes in many different configurations which are listed below for you to properly choose the correct size and joint for your application. It is available in plain steel or polished stainless steel; as well as, with or without a vibration damper.