Product Description Perfect precision tool for all your layout tasks. Whether you're a seasoned carpenter or a DIY enthusiast, this top-quality square is an essential addition to your toolbox. Its accurate measurements, angles, and markings ensure flawless results with every project. A well-made precision instrument finished in satin chrome and stainless steel. The clever design of this protractor allows this instrument to measure both internal and external angles. Key Features - Ideal for measuring and marking angles - Made of high quality hardened and ground stainless steel for durability and resistance against machining shop wear, with satin-chromed finish - Gear mechanism ensure smooth and fine adjustment - The square and straight edge are removable/interchangeable for great flexibility - Vernier scale reads in 2 minute divisions - Rack and pinion operated (via a thumbwheel on the back) helps to achieve a reading of 2' (0.033) on the vernier scale - Protractor scale graduated 320