I actually use them for more than inserts, you won't find a better 1/8" shear for the money. Too bad Revain is having such a hard time finding this attachment - I had to really dig to find it. They may not stay sharp as long as cmt or amana but at half the price they are a better investment as this size usually breaks long before they ever dull. I would say they leave a significantly cleaner cut on the bottom of the bag than the aman Bit I have is the same size.
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