Discontinued Ridgid 40-A Tristand Yoke Vise "Jack Screw" in silver. Factory part number 41230, and number 21 (obsolete) in the factory instructions, top washer not included. Screw is in well used and working condition. Dings, scratches, and tarnishing from use and storage as shown. Perfect for any tool restoration. This is a free shipping item within the US so buy now!