T-Top twin double rod holder aluminum clamp on fit 1.5",1.875",2" inch horizontal or vertical fishing tower/leaning post/rail by Raider-Made of high quality, marine-grade aluminum extrusions and cold-drawn tubing-Clamp size: 2.125”/54mm, rubber liners to fit 1.5 (1-1/2)inch/38mm,1.875(1-7/8) inch/48mm, 2 inch/51mm tubing-Rubber insert to protect your fishing rod from any wear against the metal surface-Inside diameter is 1 3/4",Length is 10 1/2"-Can be mounted to vertical or horizontal bars-Clamp turns and locks in place every 45 degrees-Easily mounts to T-Top or other hardtop, tower, radar arch, rail, or any structure made from 2",1-7/8",1-1/2" pipe-Holds up to 1 fishing rodWhat is in the box-One Twin Rod holder-One 2 1/8" clamp-Rubber inserts 1.5",1.875", 2"