Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fein blades

I never would have purchased a Fein tool had I any idea about the blade pricing. I am a general contractor and window installer and cannot afford to use two $60.00 blades per job. The blades are not durable and will be destroyed when used on fiberglass. The tool is left useless in my garrage due to the blade pricing. I think making replacement blades for the Fein at half the price may be a better business venture.