Willow Leaf Shape: This blade is in the shape of a willow leaf, when pulling the line, the blade rotates with the current at a high speed, hitting the water splash and making a sound, attracting the fish to attack. 3 Styles: Available in 3 different sizes, the product includes 30 iron fishing spring pins and 30 stainless steel fishing roller bearings. Replacement Blades for Jigs and Spinners: This is a great replacement blade for lures and spinners, willow blades, rolling swivels, fishing spring pins, stainless steel fishing roller bearing connectors, and other lure part accessories. Easy To Set Up: The blades with smooth running ball bearings spin automatically even when the lure is barely moved, much better than other types of blades. Blades Add Flash: The blades spin and vibrate as the bait swims through the water, adding action and flash to the bait. The blades add flash and action to worms, swimbaits, jigs, crankbaits, jigheads, etc., increasing the number of strikes.