Ray-JrMALL 200pcs Barrel Swivel Safety Snap Solid Rings Tackle Connector 12# Suitable for fishing big fish, barrel swivel tension value is about 20% of set value. You can easily hold fishing process, when big fish tries to get rid of fishing line. Color: Black. Material: Metal. Specification: Type A Pin 12#. Size: about 28 x 3.96 mm (L x W).