Basics on metric speed square

Looking into the metric speed square, and all of its features. Where to find a metric speed square. https://jet.com/product/detail/ac3520... For the standard speed square.    • The basics on a Speed square   For cutting common rafters with speed square.    • framing rafters with speed square   For cutting Hips with speed square.    • Cutting hip rafters with speed square   For cutting valleys with speed square.    • Cutting valley rafters with speed square