GrovTec makes high quality sling parts and accessories for a variety of firearms. Where you have modern sporting rifles, shotguns or vintage firearms GrovTec has you covered. This particular item is made from high quality steel and it features a manganese phosphate finish.GrovTec Push Button Sling Swivel (Black) Specifications and Features: GrovTec GTSW107 1.5" Push Button Sling Swivel Perfect for Wide Heavy Duty Slings Steel Construction Manganese Phosphate Finish Black 1 Push Button Swivel Per Pack