Quick change lathe tool post No. (Equivalent to the Aloris AXA, the industry standardized size). (Interchangeable with AXA tool post toolholders). Post is very clean & has seen little use. Factory original with no modifications. No owner etchings or markings, ever. Handle is straight & ball is complete without damage. Everything adjusts easily & properly. Custom base T-slot is included (2.175"long x 1.135" wide). Base T-slot may require modification to fit buyers lathe. Many tools in industry have proprietary sizes. Sandvik is a notorious example of proprietary sizing....