Thread Size: 7/16"-20 S.A.E. (Fine Thread)Outside Diameter: 1-1/2"Material: High Speed SteelAdjustable Round Split Die To Help Start A New ThreadRecess Points On Die Edge Allows Die To Be Locked Into Die HandleMachined To Precise Dimensions For Accuracy And ConsistencyCreates Male Threads Onto The Appropriate Size ProductFor Use In A Die Stock