GrovTec two-piece band fits magazine tubes .630"-.675" diameter, band barrels of certain Browning and Ruger models and .410 shotguns. Set also includes .75" rear wood screw swivel stud, Allen wrench and one pair GT Locking Swivels.Our 2-piece barrel band sets fit almost any firearm from a .22 rimfire magazine tube of 0.42 inches diameter up to shotgun barrel with a 0.9 inches diameter.