Swivel Bolt Snap 5/8 in X 3 1/3 in ( 15.9 mm X 7.9 cm) & 85 lbs working load limit.
Nickel Plated 

Use & Features
Use with rope, chain, strap, animal leashes and recreational applications.
Use with Crown Bolt rope up to 1/2 in 
Swivel eye reduces tangling 
1/4 in Opening