When attaching the bucket to the chain belt of the bucket type conveyor, we are holding 4 points with this product. I used something made of iron or aluminum until now, but it was easy to rust or was easily dislodged. After using this item, those problems were solved and the maintenance cycle became longer. On the other hand, because it is hard to be disconnected, if you operate without noticing the problem, the bucket will be larger than the conventional one, and removal with Thunder will take more trouble than before. It does not work perfectly.