Boring head set made of steel for high hardness and longer service life | 2-inch boring heads are used to provide precision and accuracy in boring operations | The mt2 boring tool kit can be used for a variety of boring tasks | Boring head size: 2 inches, connection threads: 7/8 inch - 20, MT3 handle: 3/8 inch - 16 threads | Boring head dials are clearly graduated, highly accurate and easy to operate