Can anyone help me please identify what these turned bone items may have been for. A photo can be fond on Flickr here:https://www.flickr.com/photos/garyvines/15813756281/  

One is part of a circular bone ring 60mmdiam. and the other a 35mm diam. bone washer. Both were found within a building that appears to have been used for butchering animals in the second half of the 19th century, with a stack of bovine femurs and scapula in one corner, so I suspect there was a bone working workshop there.

any ideas greatly appreciated

gary vines