SPI Quick Change, Nikken FT35-5E Shell Mill Tool Holder 1.5 Pilot. W/ 4 Shell Mill Valenite B-4-8R (only 4 inserts installed). For identification: The thickest diameter of the Taper measure 1.5. Note: This Shank is not compatible with Universal Eng. You get thirty days right to return if you’re not happy??