GrovTec US Heavy Duty Push Button Swivel Black GTSW106. Pull tested up to 450 Pounds. Non-Glare Manganese Phosphate Finish Specifications for GrovTec US Heavy Duty Push Button Swivel: Manufacturer: GrovTec US Color: Magnesium Gun Type: Rifle Gun Model: Universal Condition: New Features of GrovTec US Heavy Duty Push Button Swivel Individually packaged heavy duty push button swivel. Pull tested up to 450 Pounds. Package Contents: GrovTec US Heavy Duty Push Button Swivel GrovTec US GTSW106: Heavy Duty Push Button Swivel Black