The GRR-RIPPER is a push block on steroids. It significantly increases the amount of surface area gripping your work piece. A typical push block rests on the piece between the saw blade and fence. The GRR-RIPPER is actually two blocks in one. It's split to straddle the blade and grab both pieces simultaneously. So now it's easier to rip thin strips (1/4” or larger) and also support the original piece.