GrovTec US Heavy Duty Push Button Swivels Black 1in. This product provides a rock solid performance under the most demanding conditions. Specifications for GrovTec US Heavy Duty Push Button Swivels: Manufacturer: GrovTec US Fabric/Material: Stainless Steel Gun Type: Rifle Gun Model: Universal Size: 1 in Finish: Nitride Package Contents: GrovTec US Heavy Duty Push Button Swivels GrovTec US GTSW105: Heavy Duty Push Button Swivels Black 1in