1、Quick Location and Easy Marking: The woodworking scriber features an adjustable limit block with double pointer location for simple operation. With a built in marking steel pin on the ruler's side for secure storage. 2、Precise Marking: The scriber allows for quick location by inserting a steel pin directly into the straight edge of the location valve block. This convenient arrangement supports effortless line drawing. 3、Safe and Convenient: The scriber comes with a knob type retractable marking steel pin that merges seamlessly with the pointer, not only convenient but safe as well. By rotating the nut, you can adjust the slider location for more precise scribing. 4、User Friendly: The line drawing aid ruler is easy to use, just select the required value, tighten clockwise, extend the pin head clockwise, and push the ruler to draw the line. 5、Clear Scales: With both centimeter and inch scales to cater to varied needs, the measurements are easy to read and highly resistant to wear. Whether you're a hobbyist or a professional woodworker.