Build a Custom Push Block Here's a push block that works great and keeps your hand safely away from the blade. It's just a piece of 1/2-in. plywood with notches to fit 1/4-in., 1/2-in., 3/4-in. and 1-1/2-in. boards or plywood. The notches help hold the board tight to the saw table, and the top handle slides along the top of your fence.