Will help you get on paper without wasting shots. Comes with .177 Arbor .22 Arbor 6mm Arbor .25 Arbor 6.5 mm Arbor .27 Arbor 7 mm Arbor 30 Arbor .32 Arbor .338 Arbor .35 Arbor .375 Arbor .44 Arbor .45 Arbor .50 Arbor. All packages in heavy duty hard case.