Thumb seems to be built well. I did have to modify it to fit on the stick of my Deere 35G. Came with no instructions which was a bit disappointing. But, anyone with half a brain can figure it out. The paint/powder coat is super cheap. Was flaking off in the original packaging. But, for as cheap as it is; what can you expect. Pretty stupid design that it doesn’t lock open. If I am digging I have to completely remove the thumb. That’s the only part that I am not happy with. I have owned multiple excavators and all had manual thumbs. Have never had one that wouldn’t lock in the open position. Overall, it’s a great part for how cheap it is.