I have used this tip 4 times. In total, I cut about 4 feet x 8 inches of wood by 0.1 inches. The first use of this tool worked wonders. After that it started leaving bad burn marks on my wood. my serves and speeds. Removing just 0.02" per pass still doesn't burn well. The tip itself didn't stay sharp for very long and I'm disappointed in the purchase. It has great reviews so I'm guessing it was an accident with my dentures.