You are bidding on a used HPI Pioneer CAT40 ER40 Collet Chuck design for standard CAT40 spindles.  This holder is coolant thru the center and DIN AD/B flange coolant. (remove preset screws) This tool is dynamically balanced for 10,000-12,000 RPM.  Projection from spindle face is 4.00".

In original packaging, this is a holder only.  Please order collets and wrenches separately.  These items are available upon request.