Tendon Joint Raceboard UNI Essentials (U-Pin)Universal. Race Ready Design. The Raceboard UNI Essentials Tendon Joint is your dependable link to performancebuilt for the Exocet RS 380 and compatible with most raceboards on the market. With a low profile design, it brings your rig closer to the deck for a more direct feel and improved race stance. The TPU tendon is built for durability and comfort, secured with two large custom bolts that allow for quick tendon swaps without damaging threads or