GrovTec US Mil-Force Swivel Set Black. Refined lines reduce overall weight while increasing strength. Meets or exceeds all military specifications. Pull tested to over 600lbs of tension. Industry-leading strength is suitable for the hardest working firearms on Earth. Fits any standard swivel stud. Specifications for GrovTec US Mil-Force Swivel Set: Manufacturer: GrovTec US Color: Black Fabric/Material: Steel Gun Type: Rifle Gun Model: Universal Size: 1.25 in Package Contents: GrovTec US Mil-Force Swivel Set GrovTec US GTSW05: Mil-Force Swivel Set Black