SF Wacky Worm Rig Tool 10 Orings Fits Senkos up to 8" Each pack comes with 100 SF Wacky O-Rings for 3&4" Anglers often use O-Rings to achieve a wacky rig when using soft plastic stickbaits The SF Wacky Rig O-Rings are high quality, mechanical grade rubber O-Rings. The SF Wacky Rig O-Rings are replacements made for use with the Standard Wacky Rigging Tool and the Super Wacky Rigging Tool. This system provides anglers with an effective, and easy way to wacky rig worm-style baits. The SF Wacky Rig O-Rings are a rubber O-Ring that is traditionally used for rigging stickbaits with the wacky rig setup/technique.