Veritas Mire Saddle.
Transferring a 45deg mitre line to an adjacent perpendicular face is never easy, judging the exact position can be tricky. Not so, if it can be done with a single tool such as this Veritas Mitre Saddle. Smaller stock is also much easier to mark using this tool. The square leg is 55mm long, and the mitre face 45mm long by 32mm deep. Made from anodised aluminium.