<p>Boring range: Supports the boring capacity of 10 to 125mm, Boring head dial has clear scale and high precision | Material: The boring head is made of high-quality tool steel | Quality: The adjusting screw of the boring head is made of dynamic cast steel, with stronger strength | Usage: For milling forming and drilling machines | Package includes: 1 x 2 inch boring head, 9 x mt3 bar tool, 3 x allen wrench</p>