Function: the square center scribe measuring tool can be applied to measuring the center point and marking soft metals or wood, and is also suitable for finding precise centers, for example, use the matching steel ruler to draw 2 lines at random, and the intersection point is the center of the circle Materials: the square center scribe measuring tool is made of aluminum alloy, processed by multi-axis precision equipment, sandblasted and anodized, resistant to twisting, durability and resistance Scope of application: the center finder tool is suitable for marking centers on discs and shafts; The maximum stretchable 45 cm circular can also draw 45 and 90 degree lines; A steel ruler can be applied as a positioning block The kit includes: 1 square center line measuring tool Colour:Red Material:Metal Package Contents: 1 * square center line measuring tool 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.