The RIDGID 46368 Inner Tube Core Barrel Wrench, Size P, is used for mineral exploration, geotechnical and environmental core drilling, and soil sampling. It is specifically designed for loosening and tightening the core barrel assemblies of spearhead type wireline core barrel systems per ISO 10097. Replaceable inserts with tungsten carbide coating are used to grip the core barrel assembly components. This unique gripping surface offers superior strength without damaging or distorting the tube surface, resulting in maximum performance in the field. Please note that the Core Barrel Wrench is not suitable for use on other types of pipe or tube.