I imagine they depend on which insert head is intalled. Only comes with one insert head that is shown in the photos. 1 boring head included per listing. Boring Range: 3.340" to 4.530" (85mm to 115mm) & 4.485" to 5.670" (114mm to 144mm). Body Diameter: 2.484 (63mm).
Head Length: 3.917 approx.