[Excellent Material] 9KM DWLife Fishing Ball Bearing Swivels are made of premium brass and stainless steel.Fishing swivels can be used for extended periods of time in saltwater. [Ultra Smooth Swivel] The swivels fishing tackle has built-in stainless steel balls, which can rotate at high speed by themselves. That will reduce your fishing line risk of twisting even breaking. [Quick change] The fishing lures can be quickly replaced while ensuring the pulling force, and the replacement of the fishing baits can be completed in a few seconds. No need for the hassle of re-tying, saving you valuable fishing time.