This stainless steel depth gauge has a spring tension nut for easy depth measurements, with graduations in mm & inches. You can slide the ruler down, tighten the locknut and take the reading. It can also be used to find 3 angles: 15°, 30° & 45°.
Stainless steel rule mm (150mm) & inches (6")
3 angle finder- 15°, 30° & 45°
Spring tension nut for easy depth measurement