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Hi cutntrim. My name is Mike and havebeen in the blade/cutting tool business for 19 years. If you get a good asphalt blade, it should outlast anywhere from 60 to 80 abrasive blades. Plus you should see a cutting speed of at least 2:1. Another factor that some people overlook is that you will always have a consistant depth. The abrasive gets smaller where the diamond stays the same. Hope it helps you out for future jobs.
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Mike Reisert
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