Stainless Steel. Flush Mount. Swivel Rod Holders. 80 Series. 15. 10-1/2" Length. 1-7/8" ID. Swivel base ideal for bent butt rod fishing. Swivels to follow the fish without removing the rod from the rod holder. Great for tuna or other large fish. Cast 1-piece stainless steel swivel cup. Super smooth turning precision-machined 1/2" pivot with fine threads. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.