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Ring and Rosserhead debarkers operate on a single log at a time. In a ring debarker, a set of hinged scraper fingers rotate in a single plane perpendicular to the log. Log feeders push and pull the log through the fingers. As the fingers rotate around the log, they scrape and pull the bark from it. A Rosserhead debarker rotates a log while an arm with a high-speed rotary tool moves down the length of the log grinding off the bark as it goes. This type of debarker is good for frozen logs or types of wood with high adhesion bark but tends to have higher losses of good wood. These single log debarkers are more labor intensive than the multi-log debarkers.