Just a few years back these were all the rage and there were beaucoup threads on various forums touting these blades. Demand was high and they were not cheap as rarely back then could you find a 100 blades for under $25 and even then you had "import" them from a Third World vendor. Nowadays I rarely, if ever, see these blades mentioned. A search on this forum found only one post to sell some in the past. Now, they are under $12 per 100 on Amazon.
The times, they are a changin'.
The times, they are a changin'.