Micro Jig, GRR-Ripper System- A Breakthrough Concept Out Of The Ordinary The GRR-Ripper Precision pusher system also serves as a virtual movable blade guard that the user holds. Rather then a blade guard that is affixed to the back of the table saw, or one that hovers above it. The GRR-Ripper becomes an unyielding barricade between the blade and both of your hands. You would have to remove a conventional blade guard when attempting the cut illustrated in the photo, regardless of the type of pusher used.