Features: It is convenient to measure the angle of the drill bit to ensure the accuracy of drilling, the depth can be measured by flipping, and Makes adjustments for height and we also supply you 3-10mm Drill bit limit Rings which is more convenient to operate. Fast and accurate measure, easy to repeat position. Loosen the fixing copper screw to quickly adjust the required size, then fix it, and at the same time, it can also complete repeated positioning of the same height.Follow our photos to show how to operate Double-sided scale degrees are more convenient . Fast and accurate positioning, easy to repeat positioning, Drill depth measurement, Drill Angle Reference, Flip chip height measurement, height measurement. Selected from Metal, not easy to wear, durability Specifications: Component:Aluminium Size:Approx.11.8x5.5cm/4.65x2.17inch Package Includes: 1Pc Height Gauge note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.