QUICK CHANGE BORING, TURNING & FACING HOLDER SERIES: CXA. Suitable for lathe Swing Diameter 13 – 18″ (lathe center height 1.125 – 2.125″ top compound surface to lathe center line). 250-302 Boring, Turning Tool Holder, use tool bit up to 3/4″ and round shank tool bits up to 3/4″. Precision ground and hardened. Completely sealed for maintenance free operation. 5Pcs CXA #2 250-302 Quick Change Tool Post Boring Turning & Facing Holder Lathe. Quick Change Tool Post. We will do everything we can to give you a satisfying solution. We do our best to resolve any issue. So please talk with us and we will not let you down. FEEDBACK IS VERY IMPORTANT TO US.