Sorry for the noob question but I'm looking for help IDing these items. Ive done my best to muck around and ID some other items I got but these are stumping me... They came with an Atlas lathe TH54/10F i purchased not long ago. The old gent had the lathe for a long time as the 2nd owner and knew nothing but said he had everything. He only made some brass shavings as far as I could tell. I'm obviously new to lathes and sorting through the boxes he gave me. I think one of the following is a knurling tool but no idea if it is for this machine or how it is used. There also seems some sort of collet attached to a craftsman flange. Maybe? The first picture item on left is 5" and item on right in first pic is 4 inches and on backside reads "218". It is also threaded different than the lathe spindle. I dont know the thread count except it is small. The last item has no discernable markings except FC on a set screw. Everything is filthy so I'm trying to save time not cleaning items that dont go with this lathe. I hope this is correct forum thanks!