1.Material: Made of high quality aluminum alloy sturdy and durable quick release clip design for quick adjustment and not easy to damage.2.Easy to Use: You just need to adjust the tightness of the quick release clips to achieve different usage modes to accomplish your multiple drawing needs.3.Application: This simplescribe has various scribing applications including flooring installation tiling carpeting custom carpentry installation and other remodeling and renovation jobs.4.Elaborate Design: The Construction Scribing tool with the smoothest rolling action to avoid damage to the finished surface and it has a precise pen tip perfect for drawing very complex contours.5.Good After-sales Service: Our team provides the best service. If you have any questions please contact us in time. We will give you a professional and patient reply.Specifications:Material: Aluminum alloySingle Size:Base Length: About 141 mmPen Length: About 150 mmNotes:Manual measurement may have an error of 1-2cm.Depending on the PC the colors may be lighter-or darker.includes:1pc*Scribing Tool