Features Multifunctional: This height measuring device is versatile and allows height measurements on the external scale and depth measurements on the internal scale. Depth measurement function: This height gauge can observe the internal scale of the gauge, which can realize the depth measurement function, and it is convenient to adjust the saw table. Hollow Design: This height gauge features a hollow design, the hollow back reduces weight and increases grip. Excellent Aluminum Alloy Material: This height gauge is made of excellent aluminum alloy material, which is sturdy and wear-resistant, not easy to be damaged, and has a long service life. Wide application: This height gauge has a wide range of applications and can be used for woodworking height measurement tools, miter heights, saw blade heights and more. Specification: Item Type: Altimeter Material: aluminum alloy Measuring range: approx. 0-50 mm/0-1.97 inches Package list: 1x Altimeter Package List 1 x Height Gauge