An apparatus comprising: a helical cutter in {HEAD ~ a cylindrical envelope} of {TAIL ~ 1.3 inch diameter} by 1.3 inch length, the helical cutter being configured that 15,000 to 20,000 shearing operations per second in the cylindrical envelope are performable by the helical cutter 
An apparatus comprising : a helical cutter in { HEAD ~ a cylindrical envelope } of { TAIL ~ 1.3 inch diameter } by 1.3 inch length , the helical cutter being configured that 15,000 to 20,000 shearing operations per second in the cylindrical envelope are performable by the helical cutter
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