Looking into the metric speed square, and all of its features. Where to find a metric speed square. https://jet.com/product/detail/ac35209de8a24eef8600ac4ec89f5102?jcmp=pla:bng:anj_a3_all:all_products:na:na:na:na:na:2&code=PLA15&k_clickid=_kenshoo_clickid_ For the standard speed square. https://www.youtube.com/watch?v=yPL6jOa6AH8 For cutting common rafters with speed square. https://www.youtube.com/watch?v=4PjpA28NoHY For cutting Hips with speed square. https://www.youtube.com/watch?v=4wRnVeQnnnY For cutting valleys with speed square. https://www.youtube.com/watch?v=DkJa4UXXT5k