1、DURABLE ALUMINUM ALLOY: The woodworking ruler is made of excellent aluminum alloy and CNC process. Smooth anodized surface, durable and rust proof  2、LASER CALIBRATION: Accurate woodworking ruler uses advanced laser engraving technology to measure figures on the surface of the ruler more accurately and easily  3、NON SLIP AND REUSABLE: Built in sliding stop that can be threaded through the entire length of the ruler. This facilitates repeated measurements on multiple plates. The woodworking tool is equipped with an adjustable positioning lock, and the sliding baffle can be secured with the thumb screw on the lock to effectively prevent sliding  4、WITH GROOVE: The slide ruler has a small groove at the end with an adjustable sliding mechanism. Put a pencil into the groove to get an instant scale  5、MAIN APPLICATIONS: Woodworking tools and accessories are suitable for machining, woodworking, product design