Serious anglers, this drop-in swivel converter will change your fishing game! Made from tough 304 stainless steel, this thing is built to handle saltwater corrosion and years of hard use. It fits rod holder butts with 1-9/16 inch or smaller outside diameter and works with both 30-degree and 90-degree rod holders. The 360-degree swivel action means your rod tip can smoothly follow the fish's movement without any line friction over the roller. No more stuck rods or missed hooksets! The drain holes prevent water buildup, and installation is literally instant - just drop it into your existing rod holder and you've got a professional-grade swivel system. At about 4.9 ounces each, you get two in the package so you can set up multiple rods. Whether you're trolling for big game fish or just want better rod management on your boat, this simple upgrade makes a huge difference. The pin depth is 1-1/2 inches for secure fitting. Stop fighting your gear and start catching more fish with this smart, durable marine accessory!