The Ultimate Rig Weight for Urchin-Style Soft Plastics. 5 Per Package. Fit & Design: Rugged Design: Ensures durability and stability in soft plastic elastomer Perfectly Weighted: Maintains proper orientation and balance Lock In Hook Slot: For easy rigging and proper, consistent hookset; ensuring you won't lose your fish or your bait Shaft Length: Sized for 17mm, ensuring compatibility Pins Plastic in Place: Reduces movement on the hook shaft Versatility: Works with virtually any hook, including treble hooks