In this video I make a simple jig for creating perfect finger joints or box joints via an easy to make table saw jig.
Free plans available here: https://www.patreon.com/posts/46648425
6mm grooving blade: https://amzn.to/2N4MnSl (UK) please note, this fits my table saw which has a 30mm arbour bore - adapter rings and other blade sizes are available too