PROLUBE 44890 Easy out Grease Fitting Tool (Small). This four-way tool can be used to remove or install grease fittings. By using the screw Extractor, broken or worn out grease fittings can be removed easily. The Tap on the other end of the tool allows for Rethreading of the hole, and the drive fit tool running perpendicular can install either straight or angled grease fittings. This tool is made from durable steel, and is available in large or small sizes to fit a variety of fittings. This smaller tool can open fittings with a hex size of 5/16" and 3/8", and can Tap rethreads at 1/4" - 28. This universal tool is a great addition to workshop or garage.