Use on flat workbench.
Loosen the two fixed handles and adjust the orientation and height of each movable joint.
When the marking needle is in the desired position, tighten each fixing handle to fix the movable joint.
You can slide the base sideways on the work and mark parallel lines or horizontal lines on the parts with a marking needle.
The marking needle can be replaced with a holder, and a pencil can be attached to mark parallel lines, horizontal lines, etc. on the object.
In addition, rod-shaped tools can be attached.