Hi Darg, it sounds like the incorrect fitting was purchased. The rails we stock in the store are in the 6010 rail profile. I can tell by the item number of this fitting that it's made to match a similar, but larger profile, called the 6210 profile. The item # that will fit the store's profile is 7011R-000-HD00L. The store SKU is 467-369. Notice that the 2nd digit in the rail and fitting item numbers match. The 6
010 handrails will match any fitting that begins with 7
0xx. As long as the 2nd digits match, the rail profile, and the fitting profile, will match. If you have additional questions, we’ll reply as quickly as we can. Or, you may call our Customer Service Line at 678-455-5188 (M-F, 8-4 ET) where we can assist you with most any question you have. Thank you!