Gravity Heel Kit Auto-dropdown and adjustable to 1" Hooks the tail end of your workpiece and automatically retracts mid-board.Provides extra leverage to help push through the cut and prevent blow out. Includes 5 Heel Spacers, and mounting hardware Fits any existing GRR-RIPPER with mounts for 1-2 GRR-RIPPERs California Proposition 65 Warning: This product can expose you to chemicals including Styrene which is know to the state of California to cause cancer.Gravity Heel KitGravity Heel Kit Auto-dropdown and adjustable to 1" Hooks the tail end of your workpiece and automatically retracts mid-board.Provides extra leverage to help push through the cut and prevent blow out. Includes 5 Heel Spacers, and mounting hardware Fits any existing GRR-RIPPER with mounts for 1-2 GRR-RIPPERs