Vintage Armstrong 81-001 Quick-Change Tool Post. Armstrong piston style BXA quick-change tool post for lathes size 10 to 13 inches (not recommended for 9 inch lathes). Includes two 81-021 tool holders, mounting bolt and related hardware, and original box. Works very well and is in good condition. All sales are final unless grossly misrepresented. The item "Vintage Armstrong 81-001 BXA Quick-Change Tool Post for 10 to 13 Inch Lathe" is in sale since Sunday, April 4, 2021. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking ...