China (mainland) specialized production, the sale, used to display rack and booth (booths) building special equipment "force of the brand" three card lock (tension lock ). The product quality is good, the model is complete. A suitable for aluminum material slot width 4.5 mm and 5.2 mm to 6.2 mm to 6.5 mm, 9 mm and so on many kinds of specifications three card lock. We can produce aluminum material lumen (lock body cavity) any size three card lock.