MOSSBERG 590 SHOTGUN QUICK RELEASE 1" SLING SWIVEL SETMADE IN U.S.A. 100% Made in the U.S.A., QR - Quick Release Feature, Silent Operation Fits All Standard U.S. Swivel Bases, All Steel, Machine Finished Surfaces Silent Operation, All Steel, No Wire or Plastic Construction Stainless Steel Spring Locks Swivel Securely To Any Standard U.S. Swivel Base One Piece Body Provides Extra Strength