Greenlee PTR-7/8 Replaceable Tip Kits The replaceable tip nail eater lasts up to nine times longer than the traditional auger bit It provides the convenience of just changing the tip instead of switching to a new bit after it's worn saving room in the tool bag, time and money Replaceable tip nail eater can be used in various woods including pine green treated wood and telephone poles The patented tip pulls through wood without pushing to the finish hole The tool steel cutting edge prevents splintering for less mess and better results