What are the advantages of self-locking cable tray over ordinary bridge tray？

Since we want to compare the difference between self-locking bridge and ordinary bridge, we must first understand: what is self-locking bridge? 
Self-locking cable tray is also called self-locking bridge, self-locking bridge, locking bridge, snap-on bridge, self-locking bridge. 
So what are the advantages of self-locking bridges over ordinary bridges? 
The self-locking bridge cover plate can be fastened directly with the bottom groove, and the buckle is very tight and will not fall off. it is suitable for use in the environment of automobile factory and vertical installation, and it belongs to high-grade products. 
But at the same time, we have to talk about its disadvantage, that is, the cost is relatively high, because its workmanship is complex, the price cost is naturally a little more than the ordinary bridge, so it is more necessary for us to decide whether to choose the self-locking bridge according to the actual situation.