2Vtg Milling Machine Tapered Bit Adapter Replacement Part Piece

Description

Lot of 2 Milling Machine Tool Tapered Bits Adapters Replacement tool part piece
Sorry but I know absolutely nothing about milling machines/milling tools or even the proper name for the item (other than what was on the tag when we purchased it). We purchased several pieces from an auction in Lancaster County PA which are listed separately and all I know is they are used for milling. I do not know if these pieces work or even how they work.
A magnet does attract to them. Signs of prior use, scratches, rust covered.
I do not see any manufacture name.
See photo for measurements.
Based on photo 1 the one on the left weighs 5 pounds 14 ounces (prior to packaging) and the one on the right weighs 4 pounds 1 ounces.
We buy most of our pieces at auctions, flea markets & yard sales so we may not know the history of the item. We are not antique dealers, collectors or experts.  We describe the item along with any flaws and markings we can find the best we can
We will combine shipping whenever possible and ask that payment be made within 4 days.  We do not offer international shipping.
If you are not completely satisfied, please contact us prior to opening a claim with
eBay and we will be happy to work with you.  Thanks for looking!!