Union Butterfield Threading Die, Adjustable Round Split, Series: 2510, Measurement System: Imperial, #5-44 Thread, UNF Thread, 1/4 in Thickness, 13/16 in OD Die, Right Hand Thread, HSS, BrightRound adjustable dies can be closed down by approximately 0.006 in on diameterBright finish improves chip flow in soft or non-ferrous materials