Snap swivels include the McMahon Snap, the Lock Snap, the Safety Snap, and the Coastlock Snap. The Snap swivel is used at the end of your line or leader and is used to attach your sinker, lure, jig, etc. These snap-swivels are constructed from extremely durable, anti-corrosive steel so the corrosive effects of water won’t hinder the operation of the device.