MULTI-FUNCTION: It is convenient to measure the angle of the drill bit to 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 ring which is more convenient and worry free to operate. ADJUSTABLE: 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, pls. CONVENIENT: Metric and imperial double-sided scale degrees are more convenient . USEFUL: Fast and accurate positioning, easy to repeat positioning, Drill depth measurement, Drill Angle Reference, Flip chip height measurement, table saw height measurement. MATERIAL: Made of Metal, not easy to wear, durable. Material: Metal colour: As shown Package Contents: 1 x Measuring Gauge 8 x Limit Rings(3-10mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.