If these ever come back in stock they are very heavy duty. Cast iron and solid steel construction. Teeth are replaceable, but I doubt they would ever wear out. I ordered 64" as it was all that was available, but I cut it down for my 48" bucket and it was a perfect fit (I eliminated the last 2 teeth so I have 2 extras). Cutting it was easy enough with an air powered cutting wheel. I hit the end with a rattle can to prevent rusting). Install was easy enough. Packing was horrible with just a couple thin pieces of plywood on the top and bottom but nothing on the sides. Single wall cardboard box to try to contain the 90 plus pounds of iron. Teeth were only shrink wrapped to the bar and scratched the heck out of it. Hardware was tossed in loose and some of it was missing. Thank goodness I have enough for my shorter bar, but be aware that you may have to acquire additional hardware (I am contacting the company to see if they will send additional missing pins and bolts). I will update if they take care of this issue.UPDATE: Contacted the company and as expected they don't stock hardware in the US warehouse. They offered a small refund or to wait 2 to 6 weeks. I took the refund and purchased some extra nuts and bolts for a couple bucks. Customer service was great and very quick to communicate and took care of the issue fast. Very pleased with the entire process. Changed to 5 stars despite the few issues.