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A 103 is a nice hard small touch up hone. A 109 is a larger two sided hone that is barely fine enough for touching up a razor--I think the finer side is still too coarse for a good shave. The Oak...

There are several people in this forum who have quite a bit of experience with barber hones. A cursory look through this forum can help you find them, or just go straight to hi-bud-gl who is is...