Square 360 Degree Swivel Circle Bolt Snap Black matte approximate dimensions  Inside width: 3/4 inch, Length 2-7/8 inches High polish nickel plate & satin approximate dimensions  Inside width: 5/8 inch, Length: 2-1/2 inches Made of quality aluminum material with a 360 degree swivel to prevent tangling Spring loaded thumb latch for easy open/close  Latch automatically closes upon release Multiple uses: With rope, chain, straps, leashes, tie-downs, key chains, purses, small gates, & more!