Tablesaws come with throat plate blade slots that are too wide for safe cuts on narrow boards.
Many aluminum saws and Sears saws come with thin throat plates that are difficult to duplicate with a zero clearance slot.
By epoxying a piece of masonite under your throat plate, and adding a filler strip, you can rip thin pieces much more safely.
Cut offs don't fall into the slot and kickback at you; and you have a perfect mark of where the blade cuts - in front of the blade.
You can also add a splitter pin (ten cents) after the blade in a couple of seconds. Check out the splitter in step 4. It even works with thick plates.
After ripping a few million linear feat of lumber at the wood shows demonstrating the Grip-Tite, I have become a firm believer in zero clearance plates, as well as not putting my fingers close to a saw blade.
This is a redo of an earlier instructable that I somehow unknowingly removed.
I put in a link to a 1 minute video that shows cutting thin strips on a tablesaw with this zero clearance plate.
Warning! It is advertising a hold down/ feeder. I don't cut thin strips using my fingers and a push stick. Any hold down is better than your fingers. If you clamp hold downs before and after the blade your rip cuts are much much much safer.
Safe table saw cuts using $29.95 feeder www.grip-tite.com - YouTube