Fish Eye #5 Colorado UV Spackle Blades 2-Pack feature a UV coating that enhances attraction under direct sunlight or UV light. Available in both standard and deep cup styles, these blades perform best at slow to medium trolling speeds. They spin more easily and at slower speeds than Indiana blades, delivering superior thumping action and vibration. With the right leader length and speed, they help your rig run higher in the water, improving flash and fish attraction.