I didn't know I could get a bigger tool holder but holders for 3/4" bits when I got this parting tool so I got about 1/8" on both sides to fit my holder, and yet it's pretty damn stiff so at 3/4" it must be extremely ribbed. I will be buying another one along with a 3/4 holder to take full advantage. And the finish polishes everything, just a nice clean beautiful finish. I would definitely recommend buying this, especially if you experience vibration like I did with my old 1/2 inch split tool.