1 x Gillette 7 o'clock Permasharp Safety Razor 2 Blade - eBay (item 180458251518 end time Feb-17-10 07:59:33 PST)
Even worth the time?
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As it says: specifically designed to remove the 7 o' clock shadow.
Opinions seem to vary on these, some people find that they blunt very quickly. If you have a tough beard, that might ring alarm bells.
So what exactly do the teeth do on a safety razor? it looks like they would get in the way of the blade.