Jinman, I was planning on buying a set like that (uses turnbuckles & chain to clamp all the way around the bucket) from an outfit in western Minnesota. And wouldn't you know it, my hard drive died and with it the link & name. Do you know what brand you have?
And more importantly, they work well? Looking at all the different designs here, other than dedicated forks, they seem to be the best for strength, staying put, & adjustable vs cost. All the other designs (now, those in this thread that clamp to the _back_ of the bucket look good too if you have a strong bucket floor) look like they would slop around, bend the bucket, or are bolted into one position. Glad to hear from someone who has them!
--->Paul