I cant tell if it was even used. It is the CXA size. It uses a hex key to lock the tool holders in place, instead of an arm. Very handy for clearance issues. The item "Dorian D35CXA Quick Change Tool Post Holder. LOOKS NEW" is in sale since Sunday, March 3, 2019. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Quick Change Tool Post". The seller is "rickcact" and is located in North Grosvenordale, Connecticut. This item can be shipped to United States. Brand: Dorian MPN: SDN40CA