China (mainland) professional design, production, sales exhibition equipment "He li" brand exhibition three card lock. "He Li" brand three card lock. With outstanding quality and honor the climb is the head of the three card lock! ! ! ! ! Is the world's best exhibition three card lock. Products are 4.5 mm and 5.2 mm and 6.2 mm and 6.5 mm, 9 mm. Model is complete. According to the customer's demand, the production of various kinds of size, specifications of the exhibition three card lock.