This mandrel replacement is a must-have for anyone using hole saws in their industrial and scientific work. As a result of my tests I determined that this replacement significantly improves efficiency and versatility during use. THE unique design makes it easy to change arbor sizes, allowing for a smooth and quick transition between different hole saw sizes. The only downside is that it may not fit all types of hole saws.Overall, this mandrel replacement is a reliable addition to any cutting tool kit..