4 Pack Quick Change Tool Post Holder for OXA 250-004. Heavy duty 4 pack tool post holders for quick change boring bar setups, designed for OXA 250-004 machines. Includes four durable tool post holders for efficiency. Compatible with OXA 250-004 boring bar tool posts. Heavy duty construction ensures long-lasting performance. Quick change design reduces setup time significantly. This is an aftermarket part, not an OEM product. Compatibility may vary depending on the machine’s serial number. Keywords: quick change tool post holder, boring bar tool post, OXA 250-004 tool post, heavy duty tool holder, aftermarket tool post, lathe tool post holder, tool post for boring bar. Listing and template services provided by inkFrog.