Microjig GRR-RIPPER Advanced 3D Pushblock with Gravity Heel Kit Bundle GRR-RIPER ADVANCED 3D PUSHBLOCK Features Include: 3-Directional Force to eliminate kickback and give you superior precision, control and safety over the workpiece PRECISION, CONTROL AND SAFETY has never been so smart. The GRR-RIPPER acts as a Moving-Blade-Guard for total hand protection UNBELIEVABLE GRIPPING POWER Green-GRIP is the proprietary non-slip material that gives you superior gripping power over materials such as oak, PRECISION, CONTROL AND SAFETY has never been so smart. The GRR-RIPPER acts as a Moving-Blade-Guard for total hand protection INCLUDES GRAVITY HEEL ACCESSORY, a fully adjustable heel with auto-retracting technology for reducing blowout. Fits any existing GRR-RIPPER. Mounting Hardware Included. MADE IN THE U.S.A - A true MICROJIG Innovation.: Includes Instructional and Advanced Techniques DVD