Made of high-quality 6061 aluminum, anodized. Ensures maximum durability and reliability Well made and sturdy scribe, use the same way you use a height gauge. Each rotation of the disk increases the tip height by 0.040 inches. Height range is 0-1” high It is threaded M10*1.0 upper and lower shaft to change the height of the tip. The brass thumb screw locks the selected height setting in place. The marking machine uses a carbide tip height gauge tip JMSMSH Knife Maker's Scribe, Disc Scribe, 2X72 Knife Maker's Center Scribe, Height Gage