The replaceable body (made from “two-by” stock) rides on edge to put extra inches of solid wood between your fi ngers and the blade. And the hardboard heel, also replaceable, pushes the workpiece past the blade without any danger of kickback. To make replacing them easier, I used a screw to attach the handle to the heel and body. This means you’ll get double the life from the push block by turning it over once one edge has gotten chewed up. When you make this push block, take the time to make several extra bodies and heels. This way, you’ll always have replacements on hand whenever you need them.