The patented GRR-RIPPER is a 3D Pushblock System that offers superior precision, control and safety on your table saw and other major woodworking machinery. The GRR-RIPPER has three legs to give you three-directions of control on the Keeper and Off-Cut workpiece. It provides downward pressure to virtually eliminate kickback, inward pressure to keep the stock agains the fence, and forward pressure to prevent burning. The powerful Green GRR-RIP gives you a commanding hold over the work piece for total control. The GRR-RIPPER comes with a 2-hour Advanced Techniques DVD featuring over 30 unique uses on the table saw, router table, jointer, and band saws. Made in the USA.