Don't buy an Seckit 3D printer. They pretty much suck until you do all the work to fix the crappy design.
SeckitGo2 drag chain mount for a 10x11 chain. This is an exact fit to the chain below. No slop in the end point connections to the chain from the mounts.
Perfect hole alignment with this chain on Amazon - https://www.amazon.com/gp/product/B07WDVJB8W/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1