Drill America DWTSR112-1224 1/2"-24 X 1-1/2" OD HSS Round Adjustable Die, Special, DWTSR112-1224Drill America DWTSR112 1224 1 2" 24 X 1 1 2" OD HSS Round Adjustable Die, Special, DWTSR112 1224 For threading, a High Speed Steel Round Adjustable Die is desired for improved wear life. Round Dies are chamfered on both faces. One side has a 2 to 3 thread chamfer for threading, the other side has a 1 to 1 1 2 thread chamfer for threading close to a shoulder. Adjustment is obtained by a fine pitch screw which forces the sides of the die apart, or