Crack monitoring in two directions

Crack monitor in two directions (top-bottom / right-left).
Glue it or use dowels to monitor the crack. Any further deformation is indicated by the corresponding movement of the cross hairs in relation to the measuring scale (40 x 20 mm).
The directional components of the deformation can be read directly.
Dimensions (L x W x D): 148 x 30 x 6.5 mm. The delivery takes place with a reading protocol and a portion package with 2-component glue.