Features Depth Measuring: The wide measuring range of 5‑40mm makes the depth ruler suitable for accurate saw seam measurement. Practical Using: The woodworking gaps gauge can be widely applied to quickly set up a table saw or router for easy grooving, cutting and so on. Lockable Design: The depth measuring ruler is able to lock inside and outside sizes and compare them to other fittings to simplify the operation. Aluminium Alloy: The table saw gaps gauge is made of high quality aluminium alloy material, which is not easy to deform and also very durable. Simple Carrying: The aluminum alloy line ruler marking gauge has compact size and light weight, the convenient carrying makes it suits for indoor and outdoor use. Specification: Item Type: Depth Measuring Ruler Material: Aluminium Alloy Colour: Red and Gold Measuring Range: Approx. 5 ~ 40mm / 0.2 ~ 1.57in Function: Can be used to measure saw seam.  Package List: 1 x Depth Measuring Ruler Note: Please allow an error of 1‑2cm in the manual measurement. Package List 1 x Depth Measuring Ruler