Presto 64100 - M39 x 4.0 x 3" O/D HSS CIRCULAR SPLIT DIE M BS1127

HSS Round Adjustable Dies, also known as Button Dies, are designed for cutting external screw threads, either by hand, using a die stock or by machine, using a floating die holder. They also can be used to cut smaller or larger, than factory setting, by turning the adjusting screw in or out. Dies are manufactured with a 2-3 thread chamfer on front face and a 1-1½ thread chamfer on the rear.