More robust than I anticipated. First job I did with it was with a 3/4" Grizzly bar doing a 2" hole in a forged hydraulic fitting. What impressed me the most was how quiet the operation was - which is indicative of how strong and heavy this tool holder is.
Fit and finish are also top notch. 1" to 3/4" reducer bushing slides out easily and is fit very well to the tool body. Very pleased with the purchase.