CAT50 CV50 Stub Arbor Tool Holder, NOS / CAT50 STUB 1-1/4 X 4.000 E. Listing is for one new Cat50 stub arbor tool holder. Tool holder comes with three spacer measuring 1-3/4 X 1/2 X 1-1/4. Items came from a Eaton facility that closed. I can’t find a brand on them anywhere I figured Kennametal because everything else they had was Kennametal. If you have any other questions please ask.