A Felon

At the base do I sit,

at first glance, appear I, a misfit.

For among my peers, I seem colossal,

my company, I jostle.

My duty is quite simple you see,

separate those not in harmony.

Without me, everything would be jumbled as a whole,

but at my beckon, I cut between, making it no longer sole.

I guarantee I am something you have seen many a time,

so tell me this, what am I which cuts, but am never convicted of a crime?

Check Braingle.com for the answer.