This tension lock is used to connect all kinds of 80mm square and round poles, it is the necessary accessory of exhibition stand. The lock includes two screws LT-EG412/10, by using T25 Hexagon spline wrenches to fix screws. The material of the shell is Zinc alloy. Lingtong’s products are all reusable and non-polluting, in order to realize our vision: Bring Environmental-friendly Exhibition System Into Every Expo Space. The quality of all LT materials comply with German standards, it is well accepted by European and USA customers. Up to now, LT products have already been sold to more than 103 countries all over the world.