top Aluminum-alloy and - CNC-prcess.The - is anodized wear-resistant rust-proof thick yet light enough to not be clunky. A fine notch- is in the end of the ruler- to place a pencil. The stop is secured- with two thumb screws help- stop and fix at any position effectively slippage. The numbers- are engraved- by - which can be used for tens of thousands of -times without wearing out. With Inch and Metric Indicators on both sides this steel ruler has clear and accurate scale easy to read. Scribing ruler for woodworking handicrafts . Ideal- measuring tool for ., Manufacturer: Dcaknri