We know the luggage clasp, for its length, there is a different division, but the interference of the characteristics of its positioning is the need to maintain position, in fact, in the sample design version, due to its purposes, so in clothes or shoes package, also have different characteristics.
Actually, for the inner ring and outer ring, during compilation, if need tangerine, so at the time of link, also need to have the bald design, in fact, for the design of tangerine, also need to learn in terms of functionality, particularly for the internal stress, crucial, but for the question of whether the crack, is also very important.