One of the best additions for a table saw .
I have built several over the years and each new one had some improvements as I learned from the previous one .
This is my latest version and the big improvement is the double bottom which gives it the ability to form a zero clearence with any blade even a dado cutter and also at any tilt angle of the blade by sliding the two panels agains the blade .
It also has a replaceble insert in the fence and a easy adjustable fence to square it up again as things do come out of square over time .
A blade guard at the exit of the blade is a must to keep the blade covered to avoid an exidental injury
Also as stated above it is a improvement in cutting safety and one further improvement I will make is a clear safety shield above the blade .