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Picture of how to make a push arm for the table saw
materials needed 10inX20in plywood, T square or level, a tape measure and a pen and a band saw

Step 1: Mark your lines

Picture of Mark your lines
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I like starting in the corner a measure one inch at the bottom and at the top three inches then i make my lines. I then make a house shape at the top right i measure inch and a half on each side and one inch down and then one inch across.
 
You have come up with a good shape for a push stick. Thanks for the share.