This Mandrel Has 4 Separate Sizes To Work With. It's Not A Gradual Increase Like Most Mandrels, This One Is Tiered Like A Wedding Cake. The Base Is Retangular Shaped, 1.75" X 1.25" X 1.75", So It Will Fit Neatly In A Vise To Hold It While You Do Your Work. It Can Also Stand Upright On It's Base When Not In Use.

* Circumference Sizes: 6, 6-3/4, 7-1/2 and 8-1/4 inches

* This mandrel is made of Hard Steel, Hard Chrome weighs 5 pounds, 7.5 ounes

* The tiers provide a base to keep your project in position as you work

* This mandrel has a rectangular base-1.75"x1.25"X1.75" will fit and be held securely in a vise

*The base enables this mandrel to stand while your work or when not in use