1. It fits a rod holder butt with 1‑9/16inch or smaller outside diameter and can used with either 30 degrees or 90‑degree rod holder. 2. Made of high quality 304 Stainless Steel material,which makes it and has a long service life. 3. With this converter, the rod tip can follow the trajectory of the fish, passes freely over the roller without any friction. 4. Help your rod holder pin depth 1‑1/2inch, with drain holes on up rotate part, not hold water. 5. Easy to install, the swivel can instantly convert any in‑gunnel rod holder to a swivel rod holder. Item Type: Drop‑in Swivel Color: As Shown Material: 304 Stainless Steel Package Contents: 1 x Drop‑in Swivel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.