Very sturdy and heavy brackets. Takes a while to drill the holes and bolt everything on, but my workbench will definitely stand the test of time. I used a vise to help hold everything in place while I drilled the bolt holes. That definitely helped to keep everything aligned. There were quite alot of holes to drill and bolts to fasten, but the end result is great. The holes are too large for screws. You must use the bolts that come with the brackets so its not a beginner project.