Interchangeable with Dorian, Aloris, & Phase II CXA series tool posts. While we guarantee your satisfaction, these especially work best with our matching tool posts. Completely sealed for maintenance free operation. 5PCS QUICK CHANGE BORING BAR TOOL POST Holder CXA #4 250-304 Heavy Duty For Lathe. 5PCS CXA #4 250-304 Heavy Duty Quick Change Tool Post Boring Bar Holder 13-18.If there is any fault or problem with the product, please don't be shy to express it, we will solve it at the first time. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Quick Change Tool Post". The seller is "find-mall" and is located in this country: US. This item can be shipped to United States, Canada.