Hello Scuba, thank you for your feedback. The blades on the unit should not be wearing out quick. We would recommend reaching out to us directly regarding your use of the blades so we can look into this for you. Please email us at consumer.service@toro.com. Please specify the model and serial number of the mower you're using, and the blade part number, along with a quick description of your use so we can assist you further. Please also state if you're using them for commercial or residential use. We look forward to hearing from you soon. Thank you.