2-WAY CLAMPStainless Steel Rod HoldersFINISH:SilverMOUNTMidFITS STAINLESS TUBE SIZE*1-1/2" actual OD tube using included sleeve 53661S2)FITS ALUMINUM PIPE SIZE**1-1/4" schedule 40 pipeInvestment-cast 316 stainless steelUnique clamping system will rotate for either horizontal or vertical mountingStrong integrally-cast gimbal barSized to fit stainless tube or aluminum pipeStrong investment-cast 316 stainless steel rod holders with a sleek, swept-back look offer maximum corrosion resistance for long life. They feature a clamp system, which allows each rod holder to serve as a vertical or horizontal unit. The clamp cap comes attached horizontally. Unscrew the cap, turn 90° and the rod holder becomes a vertical clamp.*Stainless marine products are made from decorative stainless tube which is measured by its actual outside diameter and is sold in even sizes, 7/8", 1", 1-1/4", 1-1/2"**Aluminum marine products are made from schedule 40 aluminum pipe which has no measured dimension equal to the stated size. In fact: 3/4" schedule 40 pipe - 1.0625" OD; 1" schedule 40 pipe = 1.321" OD; 1-1/4" schedule 40 pipe =1.66" O.D.