KnitKing RK900 ribber is just another brand name for the Brother KR900 ribbing attachment. I had a privilege to work with this ribber: see the video of my tests. Knitking RK900 is identical to the Brother KR850 ribbing attachment (as well as to Brother KR900 and Brother KR890). Thus, read the blog post with all the details on the Brother KR850 ribber and enjoy the pictures below in the meantime.





