GrovTec US Centerfire Level Action Non-Detachable Swivel Set Black. 640-.660in diameter. Includes 3/4in non-detachable wood screw swivel rear. Specifications for GrovTec US Centerfire Level Action Non-Detachable Swivel Set: Manufacturer: GrovTec US Color: Black Additional Features: Centerfire Lever Action Non-Detachable Fabric/Material: Steel Gun Type: Rifle Gun Model: Winchester Model 94 Marlin Model 36 Marlin Model 336 Size: 1 in Package Contents: GrovTec US Centerfire Level Action Non-Detachable Swivel Set What firearm models does the manufacturer say GrovTec US Centerfire Level Action Non-Detachable Swivel Set is compatible with? The manufacturer says that GrovTec US Centerfire Level Action Non-Detachable Swivel Set is compatible with Marlin Model 336 Marlin Model 36 Winchester Model 94GrovTec US GTSW24: Centerfire Level Action Non-Detachable Swivel Set Black