Spro Power Swivels are made of high-grade stainless steel with a gunmetal black finish. They offer super smooth rotation and unbelievable strength and durability. SPRO Power Swivels are 1.5 times stronger than standard barrel swivels despite their tiny appearance. With their reduced visibility, they offer very little water resistance in trolling and are superb for finesse type fishing where stealth is the key. Excellent for use in rigs for kingfish, stripers, bass, salmon, and many more.