Solid aluminum alloy small level ruler tilt angle measurement portable mini adjustable horizontal bubble magnetic universal bubble (blueblue)

Insert a ruler to maintain a 90 degree measurement for more accurate accuracy.
The bottom has strong magnetism and can attract symbols on iron objects.

High precision three line horizontal bubble, three windows for viewing, and bubble can be fine tuned for correction.
Horizontal measurement of the tilt angle of the large window, convenient and portable.
Convex horizontal measurement, lateral horizontal measurement.
Insert a ruler to maintain a 90 degree measurement for more accurate accuracy.
The bottom has strong magnetism and can attract symbols on iron objects.
The back clip function allows the product to be fastened onto the belt at the waist, making it easy to carry.