Fish Eye #6 Colorado Perch Crystal Blades 2-Pack feature a perch-pattern crystal coating, a must-have for any tackle box. The black/blue blade includes a hammer finish for added texture. Designed for slow to medium trolling speeds, these Colorado blades spin more easily and at slower speeds than Indiana blades, producing superior thumping action and vibration. With the right leader length and speed, they help your rig run higher in the water, enhancing flash and fish attraction.