Well. I'll put in my 2 cents. I do not have one in my hand at the moment, but if memory serves me right the design with the Bass Pro weights, you may get a lil very minimal drag, such as a dipsy, but not on that scale obviously. They have more of a diving design that a standard chain keel. I have also found them running deeper, than my other keels or inlines. We found this out one afternoon running some new keels. We ran four rods and were boating fish 3-1 over the Bass pro. We shortened our lines with those by 20ft. and bingo we were on fish as consistent as the regular keels. Was an interesting observation. My conclusion was weight for weight they were indeed running a lil deeper. All four harnesses we were slamming the fish on were all the same setup also.