Dear PalmettoBay, We are sorry to hear Ridgid 7 in metal cutting diamond blade does not perform well for you. Ridgid 7" metal cutting diamond plate is engineered to cut various hard ferrous metal. We would like to know more detail on metal material type and its thickness you are cutting. Please feel free to give us a call at our RIDGID customer support number at (877) 224-2969 so that we can help.