Kokanee-Toni this is a performance guideline what spinner blades are designed for Colorado Blade running dept, shallow/rotation poor, rotation (degrees) 60 Visibility from side poor/front to back good, water resistance high /sound high/Rotation speed slow Sound frequency, low. Willowleaf running dept, deep, Rotation (degrees) 30 Visibility from side good,front to back, poor,water resistance, low/ Vibration sound, low /Rotation speed, fast Sound frequency HIGH. Indiana Blade Running dept,medium / Rotation (degrees) 45 / Visibility from side, fair/front to back, fair/ Water resistance medium/ Vibration sound, medium/Rotation speed, medium/ Sound frequency medium. there are other just an example