The Spool Dr Starter Spooling Station is designed for use with filler spools and spools with a small diameter hole. This unit comes with a 10" long 3/8" diameter rod. You can select either the interior door or exterior door model. They differ by the size of the opening that fits over the door. If you plan on using this on an interior door (standard door is 1 7/16") then order the interior model, If you plan on using on exterior doors (standard dimension 1 3/4") then order the exterior model. Also included is a 5 pack of the Line Dr elastic tensioning product ($10.95 retail value). Just install the Line Dr on your spools, slide onto the rod, insert the clips, and hang the brackets on the door to set the rod into the brackets. Have the elastic tensionsers just snug, not over tight and start spooling up your reels. No need to remove reels from rods.  Extra Rods can be purchased so you can store your line on each rod by type. Braid, Mono, Flouro. Just lift off the rod from the bracket and drop the next rod on. That easy to change line types. For baitcasting reels you want the line to come off the top of the spool. For spincasting reels line should come off the bottom. Brackets made from 304 stainless and the rods are made from solid aluminum. No plastic parts to break. If you use both the larger spools and the filler spools and would like to add the 20" 1/2 rod purchase now to save on shipping. Shipping the longer rod does add to the shipping cost. Just USPS rules.