GrovTec US Wood Screw Forend Locking Swivel Set 1.25in Black. Want to mount a sling on your lever action rifle's magazine tube? Our GT Barrel Band Swivel Sets are your answer. Our one and two-piece barrel band sets fit almost any firearm from a .22 rimfire magazine tube of .420in diameter up to shotgun barrel with a .900in diameter. Specifications for GrovTec US Wood Screw Forend Locking Swivel Set: Manufacturer: GrovTec US Fabric/Material: Steel Gun Type: Rifle Gun Model: Universal Package Contents: GrovTec US Wood Screw Forend Locking Swivel Set GrovTec US GTSW307: Wood Screw Forend Locking Swivel Set 1.25in Black