Union Butterfield Threading Die, Adjustable Round Split, Series: 2010, Measurement System: Imperial, 1-1/4-12 Thread, UNF Thread, 1 in Thickness, 3 in OD Die, Right Hand Thread, Chromium Steel, BrightRound adjustable dies can be closed down by approximately 0.006 in on diameterBright finish improves chip flow in soft or non-ferrous materialsHigher heat resistance as compared to high speed steelIt offers good machinability, wear resistance and toughness