Adjustable Round Split Die High speed steel,ground thread. Size:1/4'-2-1/2',M3-M30 Outside diameter: 1',1-1/2',2'. Adjustable round split die. With adjusting screwHigh speed steel,ground thread.ANSI B94.9 Size:1/4'-2-1/2',M3-M30Outside diameter: 1',1-1/2',2' Adjustable Round Split Die High speed steel